Lisa invests $4,000 in two types of bonds: x, which offers a 10% return, and y, which offers a 6% return. if the combined return on the investment is $300, how much did lisa invest at the rate of 6%?

An arrow is shot vertically upward at a rate of 180ft/s. use the projectile formula h=−16t2+v0t to determine at what time(s), in seconds, the arrow is at a height of 420ft. round your answer(s) to the nearest tenth of a second.

Select all of the following expressions that are equal to 2.5.

What is the measure of angle a and angle c ?