MATHEMATICS MIDDLE SCHOOL

Plz I really need help GIVING OUT 52 POINTS!!!Part A: The Sun produces 3.9 ⋅ 1033 ergs of radiant energy per second. How many ergs of radiant energy does the Sun produce in 2.45 ⋅ 105 seconds? Express your answer in scientific notation and show your work. (5 points)

Part B: Which is the more reasonable measurement of the distance between the tracks on a DVD:
7.4 ⋅ 10−4 mm or 7.4 ⋅ 104 mm? Justify your answer. (5 points)

Answers

Answer 1

Answer:

I think the answer is 7.4 x 10-4mm, because a CD is pretty small.

Answer 2

Answer:

7.4 x 10-4mm, I think. Hope this helps! Have a great day!

Related Questions

382 3/10 - 191 87/100=math difficulties please answer this question
Sarah purchased a set of art supplies for $20.90 and a pair of jeans for $18.95.The sales tax rate in the state is 7%.How much change did Sarah receive from $50
Suppose you travel taxi. What the coordinates a pUllllby are halfway from City Hall to the hospital? Is there more than onepossibility? Explain
Multiply polynomials (4x-5)^2
6 x 2/5 will be equal to, greather than, or less than 2/5?

CHECK MY ANSWER AND HELP WITH SOME QUESTIONS I BEG YOU! :( 15 POINTS

Answers

Soo all of them are correct , number 2 could be reasonable . The rest , im waiting on you to do so I can check them .. if you want me too.
dose this help?

All of them are correct!
I hope this helps, I'm debating on #2.

PLEASE HELP ME I AM FRUSTERATED SOMEONE PLEASE ANSWER THANK U ! I am crying trying cause no one seems to help me please someone help me thank u! THE QUESTION :find the expression that is NOT equivalent ,for the problems 9-16 below

Answers

First of all, don't cry. Second of all, try to post a clearer picture because it was a bit tough to see. Third of all, here are the answers:

In row 9, S is wrong because it is 27x+24y, it should be 36x+24y
In row 10, A is wrong because it is 4+20x, it should be 20x
In row 11, G is wrong because it is 15ab, it should be 10a+5b
In row 12, I is wrong because it is 15x+6y, it should be 15x+10y
In row 13, O is wrong because it is 22a+6, it should be 28a
In row 14, T is wrong because it is 14x, it should be 22x
In row 15, K is wrong because it is 15x+y, it should be 15x+3y
In row 16, T is wrong because it is 14n+84m, it should be 12m+14n

Also on another note, this might be intimidating but it is mostly adding/multiplication of variables. So if you don't know them, you might want to double check that you know how to handle variables in the future;)

Just want you check if my answer is right...i'm not good in math.Ana paid 1/4 of her money for a pair of shoes and 1/5 of it for a shoulder bag. She later spent 3/8 less the remainder of her money for a dress. What part of her money did she pay for the dress?
Answer: 3/8 of 1/4 - 1/5
= 3/8 of 11/20 = 33/160

Answers

x -> her money;
( 1 / 4 )*x = x / 4 for a pair of shoes;
( 1 / 5 )*x = x / 5 for a shoulder bag;
x - x / 4 -x / 5 = 20x / 20x - 5x / 20x - 4x / 20x = 11x / 20 the remainder;
11x / 20 - ( 3 / 8 )*x = 11x / 20 - 3x / 8 = 22x / 40 - 15x / 40 = 7x / 40 for her dress;
She pay 7 / 40 of her money for the dress.

Namel. In a science experiment, Judson is tracking theheight of a small tree. At the beginning the treemeasures 32 inches. Six weeks later the treemeasures 36 inches. Find the percent increase ofthe tree.

Answers

The percent increase in the height of tree after six week will be equal to

12.5%.

What is the Percentage?

The Latin phrase "per centum," which means "by the hundred," is where the English word "percentage" comes from. Percentage segments are those with a numerator of 100. In other words, it is a connection where the whole is always deemed to be valued 100.

As per the information in the question,

The initial height of the tree = 32 inches

After six weeks the height of the tree = 36 inches

So, the percentage change will be,

% change = (36 - 32)/32 × 100

= 4/32 × 100

% change = 12.5%

To know more about Percentage:

brainly.com/question/29306119

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