Monday
December 9, 2013

# Posts by allison

Total # Posts: 420

Trigonometry
If the shadow of a building increases by 10 meters when the angle of elevation of the sun rays decreases from 70o to 60o, what is the height of the building?

Trigonometry
Karla is riding vertically in a hot air balloon, directly over a point P on the ground. Karla spots a parked car on the ground at an angle of depression of 30o. The balloon rises 50 meters. Now the angle of depression to the car is 35°. How far is the car from point P?

Science
According to what I know, m/s is the unit for linear speed or the velocity.

calculus
Two cars start from the same point at the same time. One travels north at 25 mph, and the other travels east at 60 mph. How fast is the distance between them increasing at the end of 1 hr? Find D after 1 Hr, solve D^2=25^2+ 60^2

chemistry
if 16.o ml HCL is needed to neutralize from a 2.25g sample of organic material, calculate the mass percentage of N in the sample

science
what is the control in the following experiment - which brand of popcorn has the least amount of un-popped kernels after 3 minutes?

Math
you take the principal multiplied by the rate by the time. That equals the interest and then you add it to the principal that is the future total

math
I agree and I only agree because all of you agree

Math
The perimeter of a rectangular deck is 175 feet. The length of the deck, L, is 6 feet longer than 2 times the width, W. Which system of equations can be solved to determine the length and width, in feet, of the deck? What is the correct formula and why? a) 2L+2W=175 L=2-6W b) ...