Jill swam 200 meters in 2 minutes and 40 seconds. if each lap is 50 meters long which time is her estimated time , in seconds ,per lap

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles. i'm desperate.

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

Determine domain and range, largest open interval, and intervals which function is continuous.