Help a gurl out, my fellow Brainy's?What is the quotient written in scientific notation?
2x10^21 over 8x10^3

A.2.5x10^6

B. 0.25x10^18

C.2.5x10^17

D.0.25x10^7

Answers

Answer 1

Answer: so (2 times 10^21)/(8 times 10^3)
using the associative property
exg
xy/zt=y/z times x/t so

(2 times 10^21)/(8 times 10^3)=2/8 times (10^21)/(10^3)
2/8=1/4=0.25

when dividing exponents, just subtract the bottom number from the top number exg
10^21/10^3=10^(21-3)=10^18

so the answer is 0.25 times 10^18, but

scientific notation is
(a number >1 and <10) times 10^x

so 0.25 times 10=2.5 and 2.5>1 and <10 so this should work

0.25 times 10^18=2.5 times 10^17 ( we just took the ten from the 18)

so the answer is 2.5 times 10^17 or C

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Hey I really need help on this. Can someone please explain this question?Look at Jerry's monthly budget below. What percentage of Jerry's net income is spent on food?

Net Monthly Income: $2,970.00

Expenses:

Housing: $750.00

Utilities: $120.00

Food: $450.00

Transportation: $650.00

Healthcare expenses: $200.00

Savings: $300.00

Other expenses: $500.00

Total Monthly Expenses: $2,970.00

15.2%

25.3%

45%

60%

Answers

Answer: Approximately 15.2% of Jerry's net monthly income is spent on food.

Step-by-step explanation:

We are given that Jerry's Net Monthly Income is $2970.

Out of this, his expenses are on Housing, Utilities, Food, Transportation, Healthcare Expenses, Savings, and Other Expenses.

To find the percentage of income spent on food, we note that the food related expenditure is given to be $450.

So, to calculate the percentage, we use the formula

(\frac{450}{2970}).(100)

that is, we divide the expenditure on food by the net income and multiply this by 100 to get the percentage.

Calculating the above expression, it works out to be 15.15% or 15.2% when rounding off the decimal.

What is the answer to this?

Answers

Answer:

8 $√(2)$

Step-by-step explanation:

Rationalise the denominator by multiplying both the numerator and denominator by the radical on the denominator, that is

$(32)/(√(8) )$

= $(32√(8) )/(8 )$ → ( $√(8)$ )² = 8

= $(32√(4(2)) )/(8)$

= 4× 2 $√(2)$

= 8 $√(2)$

Markus receives dollar bills from his grandfathet for one week.On the first day he received $1; on the second day he received $2, on third day he received $4, and on the foruth day he received $8. If this continuse , how much money will markus have by the end of the week?

Answers

Marcus, oh boy I wish my grandpa did this with me, but Marcus would end the week with $167.

Grapes were on sale for $0.92 per pound . If Jeff purchased 0.75 pounds , how much did he pay for the grapes ?

Answers

The answer would be $0.69 because that is 75% of .92

-6(a+8) how do I simplify ?

Answers

Answer:

-6a-48

Step-by-step explanation:

distribute

Use the Distributive Property:

You "distribute" -6 into the equation by multiplying it by each number in the parentheses.

-6(a+8)
1) multiply -6 by a, which equals -6a
2) multiply -6 by 8, which equals -48

Your equation should be -6a-48

From there, it can be seen that you can divide -6 from each number in the equation.
-6a/-6 just leaves you with a
-48/-6 gives you 8

a-8

What is 38.95 rounded to the nearest tenth