Express in exponential form.x ? x ? x ? x ? x
A. 5x
B. x5
C. 5(x)
D. 5
Answer: B
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Solve the problem.When a constant current passes through current divider parallel resistors, the current i is given by 
where R is a variable resistor. Find di/dR.
A. 
B. 
C. 
D. 
Find the center and radius of the sphere.x2 + y2 + z2 - 4x - 12y - 8z = 25
A. C(2, 6, 4), a = 9 B. C(-2, -6, -4), a = 81 C. C(2, 6, 4), a = 81 D. C(-2, -6, -4), a = 9
Find the finance charge and total installment cost of the loan. Round to the nearest cent.Amount financed: $170Down payment: $40Cash price: $210Number of payments: 18Amount of payment: $10.69
A. $4.42; $272.42 B. $17.58; $232.42 C. $192.42; $272.42 D. $22.42; $232.42
Solve the problem.Behemoth Back Packs, Inc. finds that the cost to make each of its backpacks is $20 and each backpack sells for $79. If the company's fixed costs for a month are $7723, how many backpacks must the company sell in a month in order to make a profit?
A. at least 131 backpacks B. at most 75 backpacks C. at least 79 backpacks D. at least 146 backpacks