Write a unit rate for the situation. Round to the nearest hundredth if necessary. 210 heartbeats in 3 minutes

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Acylinder and its dimensions are shown. which equation can be used to find v, the volume of the cylinder in cubic centimeters?

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0