Which linear function is directly proportional?
1 answer:
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Answer:
the original amount was 62
Step-by-step explanation:
You can use the part over whole formula like this:
why?
because we know that 10% = 10/100, we can easily find out the answer by cross multiplying
? * 10 (let's use x, instead of ?)
=10x
6.2 * 100
= 620
Now we have an equation that looks like this: 10x = 620
By using the inverse operation tool (dividing each side by 10 to isolate x) we have:
x (or ?) = 62
Answer:
Area of sidewalk =
Bags of concrete = 277
Step-by-step explanation:
The diameter of the circular fountain is 28 ft. Radius = 28 / 2 = 14 ft
The thickness of the sidewalk is 3.5 ft. This means they want to add 3.5 ft to each radius of the fountain.
To find the area of the sidewalk alone, we have to find the area of the sidewalk alone and then subtract it from the area of the sidewalk and fountain.
That is:
The fountain is circular and its radius is 14 ft. Hence, its area will be:
The sidewalk and fountain together also form a circular shape. Their joint radius will be:
R = 14 + 3.5 = 17.5 ft
Hence, the area will be:
Hence, the area of the sidewalk alone will be:
This is the area of the sidewalk.
For every square foot (), 0.8 bag of concrete will be used. This means that for
:
Bags of concrete = 0.8 * 346.5 = 277.2 ≅ 277
At least 277 bags of concrete will be used for the new sidewalk.
Answer:
To calculate annual compound interest, multiply the original amount of your investment or loan, or principal, by the annual interest rate. Add that amount to the principal, then multiply by the interest rate again to get the second year's compounding interest
Step-by-step explanation:
A = P (1+ r/n) ^nt
A = final amount is found if you input 12 months at r
P = initial principal balance = $100 if every month
r = interest rate then interest rate will be 12 month
n = number of times interest applied per time period = 1
t = number of time periods elapsed t = eg 10
