Multiply. Express your answer in standard form.9i(8 - 8i)
A. 72i - 72i2
B. 72i- 72
C. 72i + 72i2
D. 72+ 72i
Answer: D
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Solve the variation problem.The amount of simple interest earned on an investment over a fixed amount of time is jointly proportional to the principle invested and the interest rate. A principle investment of $3200.00 with an interest rate of 8% earned $1280.00 in simple interest. Find the amount of simple interest earned if the principle is $4600.00 and the interest rate is 6%.
A. $1840.00 B. $960.00 C. $1380.00 D. $138,000.00
A formula is given along with the values of all but one of the variables in the formula. Find the value of the variable not given. Round to the nearest hundredth where necessary.A = 
(b + B)h; A = 171, b = 20, B = 18
A. h = 360 B. h = 9 C. h = 133 D. h = 19
Simplify the expression. First use the distributive property to remove any parentheses.5(x - 8)
A. 5x - 40 B. 5x - 8 C. 5x - 13 D. 5x + 40
Divide.
A. 
B. 3.95
C. 39.5
D. 80