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Gnesinka [82]
3 years ago
14

6. You want to save $1,000,000 in 40 years at a 3.5% interest rate. What is the principal (initial amount) you need to invest? R

ound to the nearest hundredth.
7. Iodine-123 (used in thyroid scans) has a half-life of 13 hours. Find k and write an equation to model this decay. Round k to the nearest thousandth.
8. Use the above equation to determine when 1% of the Iodine-123 remains in your system. Round to the nearest tenth. PLEASE HELP AND Use Growth Equation A = aekt or Decay Equation A = ae−kt for #5 - 8. Label all answers with appropriate units. thank you
Mathematics
1 answer:
labwork [276]3 years ago
3 0

Answer:

When you deposit money in a bank, the bank usually pays you for the use of your money. When you take out a loan from a bank, you have to pay the bank for the use of their money. In both cases, the money paid is called the interest. It is usually expressed as a percent. Here we shall look at a formula for simple interest.

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Does anyone know c & d please
Afina-wow [57]
Subtract the powers
c. 9-7 so 10^2
d. 8-1 so 5^7
7 0
3 years ago
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What are the x-intercepts of 4x^ + 8x - 5
mojhsa [17]
Assuming the exponent is supposed to be "^2" your equation will read:

4x² + 8x - 5

It must set equal to y to be a valid function and the y must be set equal to zero to find x-intercepts.

4x² + 8x - 5 = 0
4x² - 2x + 10x - 5 = 0
2x(2x - 1) + 5(2x - 1) = 0

(2x + 5)(2x - 1) = 0

Set each binomial equal to zero.

2x + 5 = 0
2x = 0 - 5
2x = - 5
Divide both sides by 2
x = - 5/2

2x - 1 = 0
2x = 0 + 1
2x = 1
x = 1/2

Your x-intercepts are x = - 5/2, 1/2 or (- 5/2, 0) and (1/2, 0)
6 0
3 years ago
Need help !!!!!!!!!!!!!!!!!!!
Tems11 [23]
Rectangle. it’s a 2d 4 sided shape with 2 sets of parallel sides
4 0
2 years ago
3 is what percent of 8?
kow [346]
The answer to your question is 37.5.
7 0
3 years ago
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Becky needs to make cookies for a school bake sale. The cookies need to be distributed evenly on 2 or more plates. If each plate
Lelu [443]

Answer:

We can take 2 plates , 3 plates or 6 plates.

Step-by-step explanation:

1 dozen = 12 numbers

Total number of cookies = 42

Each plate has to get atleast 7 cookies ,all the plates should have the same number of cookies and also the number of plates must be greater than or equal to 2.

  • If we take 2 plates , there can be 21 cookies in each.
  • If we take 3 plates , there can be 14 cookies in each.
  • If we take 6 plates , there can be 7 cookies in each.

These are the 3 possible cases.

Since there cannot be broken pieces, no other combination is possible.

7 0
3 years ago
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