About what percentage of the data lies within 2 standard deviations of the mean in a normal distribution?

A video game company surveys a random sample of 250 gamers who report annual income of $50,000. The company finds that the average gamer spends $206 a year on games, with a standard deviation of $12.

For a particular disease, the probability of having the disease in a particular population is 0.04. If someone from the population has the disease, the probability that she/he tests positive of this disease is 0.95.

What is the approximate area of a circle with a radius of 28 cm use 3.14

A pizza restaurant, Pizz-A, plans on selling 115 pizzas daily for delivery. For every 15 customers who eat in the restaurant, an additional 4 pizzas will be sold. Part A: Write an equation to represent the situation.

If f (x) = x+4 and g (x) = 2x2-x-1, evaluate the composition (g o f) (2).

Five cats each ate 1/4 cup of canned food and 1/4 cup of dry food. how much food did they eat altogether

Solve on the interval [0, 2Pi): 1 + cos (theta) = (sqrt (3) + 2) / 2 A. Pi/6, 5Pi/6 B. Pi/3, 5Pi/3 C. Pi/6, 11Pi/6 D. 7Pi/6, 11Pi/6

Eli invested a total of $2000 in two stocks. One stock cost $18.50 per share, and the other cost $10.40 per share. Eli bought a total of 130 shares. Write and solve a system of equations to find how many shares of each stock Eli bought.

The length of a rectangle is 12 inches longer than the width. Find the length and width if the perimeter is 184 inches.

X+8 > 18 how do you solve it