Approximately 9 out of 10 smokers began smoking before the age of 21. In a group of 400 smokers, about how many of them started before they reached their 21st birthday?

How to tell if the sine, cosine and tangent of a angle are negative or positive?

What are the domain and range of the real-value function f (x) = -2+√x+7

The height of a diver during a dive can be modeled by h=-16t^2, where h is height in feet relative to the diving platform and t is time in seconds. Find the time it takes for the diver to reach the water is the platform is 49 feet high

Lily has 83 pounds of oranges that she is putting into boxes. She is putting 7 pounds of oranges in each box. How many boxes does Lily need? 12 boxes 10 1/2 boxes 10 boxes 11 boxes

97 is what percent of 152?

Noa was walking in the forest and measured the circumference of two trees that he found. The first tree measured 37 5/8 inches around, and the second tree measured 45 1/3 inches around.

The length of a rectangle is increasing at a rate of 3 cm/s and its width is increasing at a rate of 8 cm/s. When the length is 15 cm and the width is 6 cm, how fast is the area of the rectangle increasing?

In the figure below, triangle ABC is similar to triangle PQR, as shown below: what is the length side of PQ

You work for a catering company making cakes. The catering company must create a hexagonal cake for a tool company. Your company currently makes a small cake that is hexagonal and serves 8 people. The tool company wants one cake to serve 40 people.

What is the slope-intercept form of the linear equation 2x + 3y = 6?