Suppose a brand of lightbulbs is normally distributed with a mean life of 1900 hours and a standard deviation of 50 hours. Find the probability that a lightbulb will last between 1825 hours and 1980 hours

Bicyclists in a 10-mile race were surveyed about their finishing times in minutes (f) and the number of previous races they had competed in (n). There was a negative linear relationship between f and n that is best modeled by the equation f=-0.

After their car broke down the Lambert brothers had to walk to work. John walked. 27 miles, Bill walked. 6 miles, and Larry walked. 2 miles. Who walked the furthest? I am leaning toward John, but am iffy about whether or not it is a "trick" question.

Simplify the expression by combining like terms. 3xy-2x+4-6yx+3x

Land in a development is selling for $60,000 per acre. If Jack purchase 1 ¾ acres, how much will he pay?

Write your own problem. Choose a secret number. Write clues about the number using the words is greater than and is less than.

What is the value of 13 tens

There is a geometric theorem that says if two lines are perpendicular to the same line, they are parallel to each other explain why this is true by writing & comparing equations

How do you graph (y=-1/2x-1) (y=-3x+4)

A motorboat travels 448 kilometers in 8 hours going upstream and 516 kilometers in 6 hours going downstream. What is the rate of the boat in still water and what is the rate of the current?

Jack made 50% more smoothies than yesterday. If he made 30 smoothie today how many did he make yesterday?