Trig
posted by Alli .
Need hellpp!!
If a bicycle has 26 inch diameter wheels and the front “chain”drive has a radius of 2.1 inches and the back drive has a radius of 2.5 inches, how far does the bicycle travel for every one rotation of the cranks (pedals)? Carry out all calculations exactly and round to the nearest inch the final answer only.
and this
A Ford Expedition Eddie Bauer Edition comes standard with 17'' rims (which correspondes to a tire with 25.7'' diameter). Suppose you decide to later upgrade these tires for 19'' rims (corresponding to a tire with 28.2'' diameter). If you do not get your onboard computer reset for the new tires, the odometer will not be accurate. After your tires have actually driven 5000 miles, how many miles will the odometer report the Expedition has been driven? Round to the nearest mile. Use the fact that 1 mi. = 5,280 ft.)
I don't get these at all! Please help.

Trig 
bobpursley
wouldn't the first be...
2PI*26 (2.5/2.1)?
Then
(19/17)=5000/x
solve for x the computer will underestimate the mileage.
Respond to this Question
Similar Questions

math
The figure shown the chain drive of a bicycle. How far will the bicycle move if the pedals are rotated at 180°. Assume the radius of the bicycle wheel is 13.6 inches. There's a small circle w/a radius of 1.38 in and a large circle … 
Geometry
The wheel of an adult's bicycle has diameter 26 in. The wheel of a child's bicycle has diameter 18 in. To the nearest inch, how much farther does the larger bicycle wheel travel in one revolution than the smaller bicycle wheel? 
Math
The wheels of a bicycle have a 24 inch diameter. When the bike is being ridden so that the wheels make 12 rpm, how far will the bike travel in one minute? 
pre calc
The front sprocket off a bicycle is 12 centimeters and the rear one is 5 centimeters. What is the linear velocity of the chain around the back sprocket? 
pre calc
The front sprocket off a bicycle is 12 centimeters and the rear one is 5 centimeters. What is the linear velocity of the chain around the back sprocket? 
MATH
A BICYCLE TRAVELS WITH EACH TURN OF ITS WHEELS IS ABOUT 3 1/67 TIMES THE TIRE DIAMETER. iF THE TIRES HAVE A DIAMETER OF 24 1/2 INCHES, HOW FAR DOES IT TRAVEL WITH EACH TURN OF THE WHEELS 
Geometry
The front wheel of a child's tricycle has a 10inch radius and the rear wheels have a 6inch radius. The pedals are attached to the front wheels by arms that are 7 inches long. How far does a pedal travel when the rear wheels make … 
Math
The distance a bicycle travels with each turn of its wheels is about 3 1/7 times the tire diameter. The tires on Mike's bicycle have a diameter of 24 1/2 inches. How far does it travel with each turn of the wheels? 
Math
A bicycle's wheels are 30 inches in diameter. Assuming that the angular speed of the wheels is 11 radians per second, find the speed of the bicycle in inches per second. 
geometry
A bicycle tire has a radius of 13 inches. To the nearest inch, how far does the tire travel when it makes 6 revolutions?