Solve the problem.A certain radioactive isotope decays at a rate of 0.25% annually. Determine the half-life of this isotope, to the nearest year.

A. 3 yr
B. 120 yr
C. 277 yr
D. 200 yr


Answer: C

Mathematics

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Find the LCM for the following numbers: 18 and 24

a. 6 b. 3 c. 72 d. 18

Mathematics

Answer the question. You will need to use the formula 4.9t2 + vot = s.Approximately how far will an object fall in 5 seconds, if it is thrown downward at an initial velocity of 10 meters per second from a helicopter?

A. 175.8 meters B. 167.6 meters C. 178.2 meters D. 172.5 meters

Mathematics

Perform the indicated conversion within metric units of length.651 millimeters to centimeters

A. 65,100 cm B. 65.1 cm C. 6510 cm D. 6.5 cm

Mathematics

Complete the factoring.-72z7 = -9z2( )

A. 8z5 B. -8z5 C. 8z2 D. 648z

Mathematics