Solve the problem.A speedboat moves at a rate of 28 km/hr in still water. How long will it take someone to ride the boat 320 km downstream if the river's current moves at a rate of 4 km/hr?
A. 13 hr
B. 10 hr
C. 0.1 hr
D. 10,240 hr
Answer: B
Mathematics
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Solve.The height in meters of females in a certain ethnic group is approximated by h = 0.52 + 2 log (t/3) where t is the girl's age in years and 1 ? t ? 20. Estimate a girl's height at 4 years of age in this particular ethnic group. Round to the nearest hundredth.
A. 0.52 m B. 0.77 m C. 1.12 m D. 0.96 m
Mathematics
Write using exponential notation.19 × 19 × 19 × 19 × 19
A. 195 B. 519 C. 5 × 519 D. 5 ? 19
Mathematics
Replace the question mark with inequality symbol < or >.44 ? 38
A. > B. <
Mathematics
Subtract.
A. 57,365 B. 55,359 C. 55,365 D. 55,299
Mathematics