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The time (t) required to travel is directly proportional to the distance s and inversely proportional to the speed r.

(a)  

True or False.

If m varies directly as n, then m=kn.

(a)  

True or False.

If m varies jointly as p and q, then m=pq.

(a)  

True or False.

If m varies directly as n and inversely as the square root of p, then  $m=kn\sqrt{p}.$  

(a)  

If a varies directly as b, and a =7 when b=5, find a when b=-3.

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(a)  

A worker's pay check (P) varies directly as the number of hours (h) worked, For working 20 hours, the payment is 1,000 pesos. Find the payment for 45 hours of work.

(a)  

Suppose a varies inversely with b. When b=4,  $a=\frac{1}{2}.$  Find a when b=18.

(a)  

The Law of Lever states that: "To balance a given person seated on a seasaw, the other person must sit a distance (d) from the fulcrum inversely proportional to its weight (w). " Bongbong and Abet are trying to balance on a seesaw. Bongbong weighs 100lb and sits 4 feet from the fulcrum. Abet weighs 80 lb. How far from the fulcrum must Abet sit so they would be balanced on the seesaw?

(a)  

Suppose y varies jointly as x and z, and y=32 when x=8 and z=2. Find y when x=15 and z=6.

(a)  

If y varies directly with the square of x and inversely with z. If x=2, y=1 and z=10, find y when x=4, and z=5.

(a)  

The time (t) it takes to construct a highway varies directly as the length of the road (l) and inversely with the number of workers (w). If it takes 50 workers and 8 weeks to construct 2 kilometers of highway, how long will it take 80 workers to construct 15 kilometers of highway?

(a)