√78 is between 8 and 9
∛101 is between 4 and 5
∛80 is between 4 and 5
√20 is between 4 and 5
∛600 is between 8 and 9
Answer:
A
Step-by-step explanation:
In this question, we are asked to calculate the compound interest calculated on an amount if the interest on the said amount is computed semiannually, meaning 2 times a year.
To calculate this, we make use of a mathematical formula;
Mathematically;
C •I = P(1 + r/n)^nt
where P is the principal amount = $8,000
r is the interest rate = 8% = 0.08
t = 8 years
n = number of times of compounding per year = 2
now let’s insert these values, we have;
= 8,000( 1 + 0.08/2)^(2*8)
8,000 ( 1.04)^16
= $14983.85
Move the decimal point to the right the number of places equal to the number of repeating digits. Subtract the original number. (Digits after the first instance of the pattern will be canceled.) Divide the result by a number of 9s equal to the number of repeating digits. Simplify the result.
_____
Example: 5.3181818_18
There are 2 repeating digits, so we subtract ...
... 531.8_18 -5.3_18 = 526.5
and divide by 99 . . . . . . two 9s, one for each of the two repeating digits
... = 526.5/99 = 5625/990 = 117/22 = 5 17/22
_____
More formally, if S is the value of the original number, and it has n repeating digits, you compute
.. (S·10^n - S)/(10^n -1) = S(10^n -1)/(10^n -1) = S
No, he almost earns $400
9.20 / 1.5 = 6.13
9.20 - 6.13 = 3.07
9.20 + 3.07 = 12.27
12.27 x 2.25 = 27.61
9.20 x 40 = 368
368 + 27.61 = 395.61
Mr. Evans earned $395.61 for 42.25 hrs.