Wednesday
December 11, 2013

# Posts by kristy

Total # Posts: 143

Calculus
I tried plugging in the numbers for the variables, but I am not coming up with the right answer. I think the equation might be wrong.

Calculus
At noon, ship A is 180 km west of ship B. Ship A is sailing east at 40 km/h and ship B is sailing north at 30 km/h. How fast is the distance between the ships changing at 4:00 PM?

Physics
How long will it take a 1830 W motor to lift a 285 kg piano to a sixth-story window 16.0 m above?

probability
if digits can't be repeated, how many 4-digit numbers can be arranged using the digits 1, 3, 5, 7, and 9?

probability
if a fair coin is tossed 4 times, what is the probability of getting heads the first 3 times, and tails the fourth itme?

investing
You have a \$ 2 million portfolio consisting of \$100,000 investment in each of 20 different stocks. The portfolio has a beta of 1.1. You are considering selling \$100,000 worth one stock with a beta of 0.9 and using the proceeds to purchase another stock with a beta of 1.4. What...

teacher aide
Need help! If you're preparing a bulletin board, how many ideas should you try to get across at one time? A One B Two C Four D As many as possible I think A one, but I can't seem to find it anywhere. Can someone plz help.

trig
Use the appropriate cofunction to find an equivalent expression for cos 54° cot 24 sec 32 sin 36 csc 44

trig
A passenger airplane flying at an altitude of 1.8 km starts its final airport approach by descending at an angle of depression of 6°. How far along the ground is the airplane from its landing point

trig
Given a right triangle with legs 8 and 5, find the measure of the two acute angles. (Round to the nearest hundredth

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