An arrow is shot vertically upward from a platform 25ft high at a rate of 172⁢ft/sec. when will the arrow hit the ground?

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

In the given figure ar(adf) =ar(cda) and ar(cdf) = ar(cdf). show that abdc and cdfe are trapeziums.

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%