An account earns 10% annual compound interest. the amount in the account after t years is equal to the principal times the expression (1 + 0.10)^t, or 1.10^t. to the nearest tenth of a percent, what is the monthly compound interest rate?

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

a. the are of the rectangle is 18.25

b. 18.25 times two is 36.50

rae me : d