Please help for brainliest!!:)

Answer:

d)

Step-by-step explanation:

we know, that i = sqrt(-1)

so, i² = -1

i³ = -i

i⁴ = -i × i = - -1 = 1

i⁵ = i⁴×I = 1×i = i

and the cycle begins again for any higher exponents.

so, we find out what i^n is, by dividing n by 4 and look at the remainder.

remainder = 0, i^n = 1

remainder = 1, i^n = i

remainder = 2, i^n = -1

remainder = 3, i^n = -i

so, what is 139 in this regard ?

139 ÷ 4 = 34

remainder 3

so, i¹³⁹ = -i

a) 322 ÷ 4 = 80

remainder 2. not equivalent.

b) 304 ÷ 4 = 76

remainder 0. not equivalent.

c) 221 ÷ 4 = 55

remainder 1. not equivalent.

d) 239 ÷ 4 = 59

remainder 3. this IS equivalent.

Which of the following decimals is equal to 3 1/40
?


please explain why
3.0025

3.025


3.0250

5(x - 2) + x = 6(x -4)

good night lol


what ever..........​

Read the passage below.
You will respond by writing an informational response paragraph.
You will find specific writing directions below the passage.


GOLD IN THE SKY
By Alan E. Nourse

Chapter 1. Trouble Times Two

The sun was glowing dull red as it slipped down behind the curving horizon of Mars, but Gregory Hunter was not able to see it.

There was no viewscreen in the ship's cabin; it was too tiny for that. Greg twisted around in the cockpit that had been built just big enough to hold him, and shifted his long legs against the brace-webbing, trying to get them comfortable.

He knew he was afraid ... but nobody else knew that, not even the captain waiting at the control board on the satellite, and in spite of the fear Greg Hunter would not have traded places at this moment with anyone else in the universe.

He had worked too hard and waited too long for this moment.

He heard the count-down monitor clicking in his ears, and his hands clenched into fists. How far from Mars would he be 10 minutes from now? He didn't know. Farther than any man had ever traveled before in the space of 10 minutes, he knew, and faster. How far and how fast would depend on him alone.

"All set, Greg?" It was the captain's voice in the earphones.

"All set, Captain."

"You understand the program?"

Greg nodded. "24 hours out, 24 hours back, 90 degrees to the ecliptic1, and all the acceleration2 I can stand both ways."

Greg grinned to himself. He thought of the months of conditioning he had gone through to prepare for this run ... the hours in the centrifuge to build up his tolerance to acceleration, the careful diet, the rigorous hours of physical conditioning. It was only one experiment, one tiny step in the work that could someday give men the stars, but to Gregory Hunter at this moment it was everything.

"Good luck, then." The captain cut off, and the blastoff buzzer sounded.

He was off. His heart hammered in his throat, and his eyes ached fiercely, but he paid no attention. His finger crept to the air-speed indicator, then to the cut-off switch. When the pressure became too great, when he began to black out, he would press it.

But not yet. It was speed they wanted; they had to know how much acceleration a man could take for how long and still survive, and now it was up to him to show them.

Fleetingly, he thought of Tom ... poor old stick-in-the-mud Tom, working away in his grubby little Mars-bound laboratory, watching bacteria grow. Tom could never have qualified for a job like this. Tom couldn't even go into free-fall for 10 minutes without getting sick all over the place. Greg felt a surge of pity for his brother, and then a twinge of malicious anticipation. Wait until Tom heard the reports on this run! It was all right to spend your time poking around with bottles and test tubes if you couldn't do anything else, but it took something special to pilot an XP ship for Project Star-Jump. And after this run was over, even Tom would have to admit it....

There was a lurch, and quite suddenly the enormous pressure was gone.

Something was wrong. He hadn't pushed the cut-off button, yet the ship's engines were suddenly silent. He jabbed at the power switch. Nothing happened. Then the side-jets sputted, and he was slammed sideways into the cot.

He snapped on the radio speaker. "Control ... can you hear me? Something's gone wrong out here...."

1The great circle that is the apparent path of the Sun.

2The process of moving faster or happening more quickly.

------------------------

Now that you have read the passage, you will write an informational response paragraph to answer the following question:

How does this story create a feeling of tension or conflict?

Read the directions carefully so you know what to include in your essay.

Begin your paragraph by rephrasing the question into a topic sentence. Be sure to include the title and the author.
Include 3 or more specific examples, details, or quotes from the passage to support your answers to the prompt.
End with a conclusion sentence to wrap up your ideas.
Proofread your work before submitting.
(100 points)

10x-9y=24

y= x-2
find x and y

Sam saved $40 each month for 3 years. Then, he spent 65% of his savings on a cruise. How much of his savings was left? A. $420 B. $588 C. $1,092 D. $1,260​

When using a ruler, where is the unit?
- The tick marks on the ruler.

- The space between the tick marks on the ruler.

-The numbers on the ruler.

Help help help help help

Which inequality does the graph represent?

IF CAR A TRAVELS AT 45 MI/HR CAR B LEAVES 15 MINUTES LATER TRAVELING AT 60 MI/HR WHEN WILL B CATCH UP TO A

Listen
If you draw a triangle with these measurements, which kind of triangle would it be?
Angles Sides
400
4 cm
50
7 cm
90°
8 cm
O acute scalene triangle
O acute isosceles triangle
O right equilateral triangle
Oright scalene triangle

Ms. jones is 50bls over weight. she decided to follow a diet to lose 50% of her excess weight by the first month, 20% by the end of second month and 25% more by the end of third month. how much of excess weight does she still has by the end of the third month

Show that the equation y + 2 = 2(2x + 1) is linear and that it represents a proportional relationship between x and y.

3. Find to the nearest thousandth: log7 80

given f(x)=-3x^2-7x ,find f(7)

10. Find three consecutive even integers such that the product of the first and the second is 92 more
than twice the third integer.

find the perimeter of rectangle whose length is 5m 20 cm and breadth 3.5m​

Help help math math math

What Is the answer
Plz it's urgent ​

what is the output of the function when the input is −3

What is f(3) for the function f(x) = 5x + 7?

Write down three integers, all less than 25, whose
• range is 10, and
• mean is 13.
The three integers are

what is 2*38 i need help

What is the constant term -6+x4-x2

Work out the area of the triangle.

Solve for x.
9x + 1 = 7x - 8x + 4

A newborn child receives a ​$6000 gift toward a college education from her grandparents. How much will the ​$6000 be worth in 18 years if it is invested at ​7.6% compounded​ quarterly?

[tex]2 log_{3}(8) - 3 log_{3}(2) [/tex]
what is the answer to the question​

It was in -5 degrees Celsius Copenhagen and -10 degrees Celsius in Oslo. Which city was
colder?

At Buffalo Wild Wings, you order a meal that costs $15.86. You leave an 18% tip (on the pre-tax amount).
The sales tax is 8%. What is the total cost of the meal?