Luke says you can always add and you can always multiply to join groups. is he correct? why or why not

A cannon ball shoots out from a cannon that is 28 inches long at 2700 ft s. What is the acceleration and its time outside the cannon.

One earthquake has magnitude 3.3. If a second earthquake has 120 times as much energy as the first, find the magnitude of the second quake.

Suppose that the lifespan of laptops is normally distributed with a mean of 24.3 months and standard deviation of 2.6 months. If USP provides its 33 staff with a laptop, find the probability that the mean lifespan of these laptops will be less 23.

Matt Drew a shape with four sides of different lengths. two of the sides are parallel. what shape did Matt Draw? A. pentagon B. quadrilateral C. rhombus D. trapezoid

Pick any number and add 1 to it. find the sum of the new number and the original number. Add 9 to the sum. Divide the new sum by 2 and subtract the original number from the quotient

The sum of two numbers is 90. their difference is 12. what are the numbers?

Stat crunch in a random sample of 200 adults, what is the probability that less than 33 % have no credit cards?

There are 2.54 centimeters in an inch. when using this conversion factor, how many significant figures are you limited to?

How many 4 letter words can be formed from the alphabets?

What is the common factor of this term 6xy^2 = (3x) (?)