MATHEMATICS MIDDLE SCHOOL

Pls help Simplify (7.4 × 10−8) − (3.8 × 10−9). Write the final answer in scientific notation.

3.6 × 101
3.6 × 10−1
7.02 × 10−8
7.02 × 10−9
(if you could explain how to do this that would really help)

Answers

Answer 1
Answer:

Answer: Guess

(Reason: Guessing is important for your mind. it may be hard for to guess but id say im guess for this answer is)

1. 363.6

2.35

3.62.2

4.61.2

I hope it helps!
Answer 2
Answer: Anything you multiply in 10 you just need to move the dot one space right. So 7.4x10 is 74. Then, you need to subtract the 8 and you’re done with the first be parenthesis. (74-8=66). In the next parenthesis you do the same. 3.8x10 is 38 and 38-9 is 29. Now just subtract 38 from 66 and you have the answer.

Remember to always solve each parenthesis first, then do multiplying and division and in the end adding and subtracting. Good luck

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Write 25,000 in expanded notation using exponents

Answers

25,000 in the expanded notation is 2.5 × 10⁴

What is an expanded notation?

Expanded notation, also called expanded form, is a handy way to write numbers that show the place value of each digit.

It looks like an addition problem and will help you break numbers down and understand their place value.

Given is a number 25000 we need to convert it into an expanded form,

25000 = 25 × 10³ = 2.5 × 10⁴

Hence, 25,000 in the expanded notation is 2.5 × 10⁴

Learn more about expanded notations, click;

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Hi

25,000 = 25 × 10³ = 2.5 × 10⁴

Answer: 25,000 = 2.5 × 10⁴

What is the solution of -x+4>2

Answers

There is no single solution but there is a group of solutions also known as the interval.

</p><p>-x+4>2 \n</p><p>-x>-2 \n</p><p>x<2</p><p>

This can be written with an interval.

x\in(-\infty, 2)

Hope this helps.

r3t40

5·cubed squreroot -27+18

Answers

so factor -27
-27=-1 times 3 times 3 times 3
∛(-1 times 3 times 3 times 3)=3 times ∛-1
remember that ∛-1=-1
2 times ∛-1=3 times -1=-3
now we have
5 times (-3)+18
5 times -3=-15
-15+18=3
answer is 3

What is the perimeter of a trapezoid

Answers

The perimeter is the sum of the lengths
of the trapezoid's four sides.

The perimeter of a figure is the distance around the figure. To find the perimeter of a trapezoid, simply add the lengths of the sides. The sum of all the sides added together will be the perimeter of the trapezoid.

Idk how to do this ?!?! HELP

Answers

It's asking you what percent of 500 is 430, and you can answer that by first dividing 500 by 100 to find 1%, which is 5, and then dividing 430 by 5, which is 86%, which is your answer. To fill in your sheet, you put the 430 in the left box and the 500 on the right. I hope this helps!

Find the surface area of this prism and explain how and FINAL EXAMS tomorrow HELP!!!!!!!! Please

Answers

surface area formula of a prism is:
S.A = 2 × Area of base + Perimeter of base × Height of prism
So the given are:
5 cm, 2 cm, and 3 cm

The base is an equilateral triangle
So the base is 3 cm and height is 2 cm
and we know the area of a triangle is:
A = (1)/(2)bh
P = add all sides together

Substitute them:
S.A =  2 × (1)/(2)(3)(2) + (3 + 3 + 3) × 5
       = 6 + 45
       = 51 cm²
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