Q and A for the topic: General

Model math - Claire drew a model of five tenths. Explain how Claire could change her model to show how many hundredths are in five tenths.

Calculate the area of a right triangle with sides of 6 in, 8in, and 10 in

Calculate the area of a square with P= 20mm

3x - 4y =-6 2x + 4y = 16

The product of two consecutive even integers is 8 less than five times their sum. Find the two integers

The length of a side of a regular hexagon whose perimeter is 49.8 ft Find the dimension round to the nearest hundredth

Solve -20y=25

The dimensions of a rectangle whose length is 4 times its width and whose perimeter is 94 cm Find the dimension round to the nearest tenth if necessary

Write and solve a proportion 0.2 is what percent of 16

do people who exercise regularly score higher than people in general on a measure of health? for people in general, the average on this test is 80 with a standard deviation of 12. the distribution is normal. a researcher tested a sample of 30 people who exercise and found them to have a mean score of 86. use the .05 significance lever for this problem

A 4.5m tall tree casts a shadow 6m long. Find the angle of elevation of the sun at that time

Use unit multipiers to convert 5000 meters per hour or feet per second

 Suppose you have to use a hammer in your hand on a wall with a screw of mass 9300 g. The hammer is 18 cm long. Calculate the torque of the screw?

 A cylinder makes six turns in 2 seconds, calculate: a) its angular velocity in rad/s; b) its period and c) its frequency.

 A 73,000 g Ferris wheel accelerates from rest to an angular speed of 6.2 rad/s in 2 minutes. Considering the wheel as a hollow circular disk of radius 200 cm, calculate the net force on it?

 A cylindrical piece of material 12 in in diameter is rotated on a lathe at 1300 rev/min. What is the tangential velocity at the surface of the cylinder? Value 4 points

 A pulley in a well with a diameter of 1200 cm initially rotates at 1.3 rev/s and then receives a constant angular acceleration of 3.12 rad/s2 . What is the tangential velocity of a belt mounted on said pulley? After 1 second, what is the tangential acceleration of the belt?

Why do we use multiplication when dividing fractions. I know how to do the steps, but why do you keep the first number, changed to multiplication, and then write the reciprocal of the fraction. I guess I just don’t understand why we switched to multiplication. Thank you.

Prove the trig identity: Sec^2x-Sin^2xSec^2x=1

Prove the trig identity: 1+Sec^2x/Sec^2x = 1 + cos^2x