(Please show your work..) The data set shows the January 1 noon temperatures in degrees Fahrenheit for a particular city in each of the past 6 years.

28 34 27 42 52 15

C; What is the sum of the squares of the differences between each data value and the mean? Use the table to organize your work.

D; What is the standard deviation of the data set? Use the sum from Part (c) and show your work

Sketch one cycle if the cosine function y=2cos2theta

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?

Two less than the quotient of a number and four is less than six. i need the inequality. a. x< 32 b.x< -32 c.x> 16 d.x> -16