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A 19 ft ladder leans against a wall. The bottom of the ladder is 5 ft from the wall at time t=0 and slides away from the wall at a rate of 1 textrm{ft/sec}.
Find the velocity of the top of the ladder at time t=2.
Kent worked in the housewares section of a department store. This year he set a record high for vacuum sales with 567 vacuums sold. The previous high was last year, when 540 vacuums were sold. What is the percent of increase in sales from last yea..
A textbook store sold a combined total of physics and biology textbooks in a week. The number of biology textbooks sold was less than the number of physics textbooks sold. How many textbooks of each type were sold?
a high sxhool graduating class is made up of 462 students. There are 222 more girls than boys. How many boys are in the class?
Maryam pays $3000 on the 30th day of a $7,000, 120-day, and 8% loan.
A rectangular storage container with a lid is to have a volume of 16 m3. The length of its base is twice the width. Material for the base costs $8 per m2. Material for the sides and lid costs $16 per m2. Find the dimensions of the container which ..
What is the balance after one year if an account containing $500 earns 5% annual interest, if the interest is compounded:
Demand,Revenue, & the Largest Reduction to maximize Revenue, 200 DVD players are sold per week for $300 each. For each $10 rebate (reduction in sale price), 20 additional DVD players are sold.
Independent events based probability. A company operates a telephone order system for a catalogue of its outdoor clothing products. The catalogue orders are processed in three stages. In the first stage, the telephone operator enters the order int..
Mathematicians say that division by zero is forbidden. The expression 5/0, for example, is undefined. "Undefined" in this sense means "unable to be determined". Why is this?
A boxing ring is in the shape of a square, 20 ft on each side. How far apart are the fighters when they are in opposite corners of the ring?
What is the probability density function for the lifetime of the machine assuming that it will only function if all 10 components are working. The pdf for one component is f(x)=Ax(12-x) for 0
A machinist can produce 114 parts in 6 minutes. At this rate, how many parts can the machinist produce in 15 minutes?
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