X) 4.3.43 Evaluate. A bicyclist accelerates at a constant rate from a standstill to 45 km/hr in 72 sec. es Evaluate. a) How fast is the bicyclist traveling after 25 sec? b) How far has the bicyclist traveled after 72 sec? f (5x3 + 5) dx e6 a) After 25 sec, the bicyclist is traveling km/hr. I ( ex- ;] dx - (type an exact answer in terms of e.) (Round to two decimal places as needed.) f (5x3 + 5) dx = (Type an integer or a simplified fraction,) A company finds that the marginal profit, in dollars, from drilling a well that is x feet deep is given by P"(x) = 21/x. Find the profit when a well 300 it deep is drilled, disregarding any fixed costs The total profit is $ (Round to two decimal places as needed.)