Answer:
30
Step-by-step explanation:
WE use permutation for this question:
since the letters in SQUARE are all distinct, so：
Caroline receives $80 for her birthday
1 answer:
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Answer:
a)
b) Mr. Kelly’s class.
c) $29.52
Step-by-step explanation:
a) Let's call:
s: the number of fruit pies sold by Mr. Sanchez’s class.
k:<em> </em>the number of fruit pies sold by Mr. Kelly’s class.
You can set up the following system of equations:
You can solve it by the Elimination method:
- Multiply the first equation by -1.32.
- Add both equations.
- Solve for k.
Then:
Susbtitute k into any of the original equations and solve for s:
b) The amount of money earned by Mr. Kelly’s class was:
The amount of money earned by Mr. Sanchez’s class was:
Then, the class that earned more money was: Mr. Kelly’s class.
c) Subtract both amounts of money:
Answer:
D) $5385.10
Step-by-step explanation:
Exponential equation of decay:
The exponential equation for the decay of an amount after t years is given by:
In which A(0) is the initial amount and r is the decay rate, as a decimal.
If you buy a motorcycle for $12,500 in 2015 and it depreciates (shrinks) in value by 15.5% every year
This means that
So
How much will it be worth in 2020?
2020 is 2020 - 2015 = 5 years after 2015, so this is A(5). So
The correct answer is given by option D.