Monday

March 30, 2015

March 30, 2015

Posted by **y912f** on Wednesday, January 7, 2009 at 1:19pm.

1. a bicycle with a 28-inch wheel(diameter) travels a distance of 800 feet. how many revolutions does the wheel make (to the nearest revolution)?

2. A wheel with a 20-inch radius is marked at two points on teh rim. the distance between the marks along the wheel is found to be 3 inches. what is the angle (to the nearest tenth of a degree) between the radii to the two marks?

it would be realy helpful if you could explain to me how to figure out these two. thks

- trigonometry -
**Reiny**, Wednesday, January 7, 2009 at 1:27pm1. How far does the wheel go in 1 rotation?

C = piD = pi(28)inches

but 800 feet = 9600 inches

so no of rotations = 9600/(28pi) = 109 to the nearest whole number

for 2. is the 3 inches the straight line distance betweeen the points or is it measured along the arc?

If straight, use the Cosine Law,

If arc length, set up a ratio..

angle/360 = 3/(40pi), solve for "angle"

**Answer this Question**

**Related Questions**

math - Suppose that a hypothesis test is to be carried out by using á = 0.05. ...

calculus - I have posted this question earlier and had the answer given to me ...

Annuities - Victore French mad a deposit of 5000 at the end of ech quarter to ...

analogies!! - i have tried to figure out the answer a lot of times but i can't ...

Math - No i cant figure out the pattern that you sent me, also i wanted to know ...

Geometry-Solve for x - ok so I have to solve for x in this problem. and I have ...

Math Help!! - I have to do a scale drawing. The actual measurments of my room ...

critical thinking - I have 4 out of 50 questions left...I cannot figure out the ...

Math - A quiz had some 3-point and some 4-point questions. A perfect score was ...

Math - I have a matrix with brackets around [7 6 ][13] [14 -6] [8] and i know ...