Evaluate cos(sin^-1(-5/13)) . answer using slash bar or fraction sign.

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers

Idk math. i need to fill in the missing numbers . due tommorow !