Solve.A particular substance decays in such a way that it loses half its weight each day. How much of the substance is left after 8 days if it starts out at 64 grams?
A. 4 grams
B. 
gram
C. 2 grams
D. 
gram
Answer: D
Mathematics
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Solve the equation. Round your answer to three decimal places.2x = 18
A. 4.170 B. 2.197 C. 0.240 D. 9.000
Mathematics
Use the change-of-base formula and a calculator to evaluate each logarithm.log45 + log811
A. 1.3388 B. 1.5963 C. 1.7285 D. 2.3141
Mathematics
If necessary, write the equation in the standard form ax2 + bx + c = 0. Then identify the values of a, b, and c. Do not actually solve the equation.8x2 + 15x - 2 = 0
A. a = 8, b = -15, c = -2 B. a = 8, b = 15, c = 2 C. a = 8, b = -15, c = 2 D. a = 8, b = 15, c = -2
Mathematics
Convert to an exponential equation.ln 39 = 3.6636
A. e3.6636 = ln 39 B. e3.6636 = 39 C. e39 = 3.6636 D. e3.6636 = 1
Mathematics