Solve the problem.A certain radioactive isotope decays at a rate of 2% per 100 years. If t represents time in years and y represents the amount of the isotope left then the equation for the situation is 
In how many years will there be 93% of the isotope left?
A. 363 years
B. 253 years
C. 350 years
D. 700 years
Answer: A
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Find gross earnings. Overtime is one-and-a-half times the normal per piece rate.Mark Miller is paid $2.18 for each fishing reel assembled and is charged $1.12 per rejection. One week he assembled 208 reels at the regular rate, 24 reels at the overtime rate, and had 6 chargebacks.
A. $538.64 B. $499.04 C. $525.20 D. $531.92
Solve.The number of centimeters, d, that a spring is compressed from its natural, uncompressed position is given by the formula 
where W is the number of joules of work done to move the spring and k is the spring constant. Solve this equation for W. Use the result to determine the work needed to move a spring 8 centimeters if it has a spring constant of 0.6.
A. W = 2d2k
B. W = 
C. W = 
D. W = 
Find all complex solutions for the equation.90x-2 + 73x-1 = 30
A. 
B. 
C. 
D. 
Establish the identity.tan
= -cot x
What will be an ideal response?