Answer:
12%
Step-by-step explanation:
First, converting R percent to r a decimal
r = R/100 = 12%/100 = 0.12 per year,
then, solving our equation
I = 3900 × 0.12 × 0.25 = 117
I = $ 117.00
The simple interest accumulated
on a principal of $ 3,900.00
at a rate of 12% per year
for 0.25 years is $ 117.00.
a. Area = 121 ft²
s² = 121
s = √121
Therefore s = 11 ft
b. Area = 81 yd²
s² = 81
s = √81
Therefore s = 9 yd
c. Area = 324 cm²
s² = 324
s = √324
Therefore s = 18 cm
d. Area = 361 mi²
s² = 361
s = √361
Therefore s = 19 MI
18
4*3 = 12
1/2 * 3 * 4 = 6
u could ask them to calculate it themself
the answer is 7.07