Find the product.7x7(-9x6 + 12)

A. -63x6 + 84
B. -63x13 + 84x7
C. 21x7
D. -63x13 + 12


Answer: B

Mathematics

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Find the slope of the polar curve at the indicated point.r = 1 - sin ?, ? = 0

A.
B. -1
C. 2
D.

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Write the contrapositive of the statement. Then use the contrapositive to determine whether to conditional statement is true or false.If 10 does not divide the counting number, then 5 does not divide the counting number.

A. If 5 divides the counting number, then 10 divides the counting number. true B. If 5 divides the counting number, then 10 divides the counting number. false C. If 10 divides the counting number, then 5 divides the counting number. false D. If 10 divides the counting number, then 5 divides the counting number. true

Mathematics

Divide. Express the quotient in lowest terms. ÷ 

A.
B.
C.
D.

Mathematics

Solve the problem.Strontium 90 decays at a constant rate of 2.44% per year. Therefore, the equation for the amount P of strontium 90 after t years is P = P0 e-0.0244t. How long will it take for 15 grams of strontium to decay to 5 grams? Round answer to 2 decimal places.

A. 40.50 years B. 450.25 years C. 4.50 years D. 45.03 years.

Mathematics