# Posts by Grayson

Total # Posts: 19

**Math - Are they right?**

Yay! :) Thanks!

*January 20, 2016*

**Math - Are they right?**

350 is 70% of what number? A) 500 *** B) 420 C) 245 D) 280 What percent of 64 is 24? A) 267% B) 62.5% C) 40% D) 37.5% *** What percent of $6.50 is $2.60? A) 25% B) 40% *** C) 90% D) 250% 20% of 140 is what number? A) 280 B) 120 C) 28 *** D) 12

*January 20, 2016*

**chemistry**

A chemist heats a sample of copper(II) sulfate and finds that 63.9% of the mass is copper(II) sulfate and the other 36.1% by mass is the water. What is the formula of the hydrate?

*March 18, 2015*

**11th Grade Geometry**

A yardstick casts a shadow of 24 in. at the same time a telephone pole casts a shadow of 20 ft 8 in. What is the height of the telephone pole, to the nearest inch? (1 yd = 36 in., and 1 ft = 12 in.)

*March 6, 2015*

**Physics**

A cheetah is hunting. Its prey runs for 2.88 s at a constant velocity of +8.93 m/s. Starting from rest, what constant acceleration must the cheetah maintain in order to run the same distance as its prey runs in the same time? (Give the magnitude of the acceleration

*January 30, 2015*

**Physics**

A Boeing 747 "Jumbo Jet" has a length of 55.9 m. The runway on which the plane lands intersects another runway. The width of the intersection is 24.0 m. The plane decelerates through the intersection at a rate of 5.61 m/s2 and clears it with a final speed of 43.3 m/s...

*January 30, 2015*

**Physics**

A bullet is fired through a wooden board with a thickness of 12.0 cm. The bullet hits the board perpendicular to it, and with a speed of +370 m/s. The bullet then emerges on the other side of the board with a speed of +333 m/s. Assuming constant acceleration (rather, ...

*January 30, 2015*

**chemistry**

The level of water in an Olympic size swimming pool (50.0 meters long, 25.0 meters wide, and about 2 meters deep) needs to be lowered 3.2 cm. If the water is pumped out at a rate of 5.0 liters per second, how long will it take to lower the water level 3.2 cm?

*January 16, 2015*

**Science**

I think it should be A or B

*May 21, 2014*

**Science**

How could an architect estimate the weight of a brick wall if each brick weighs three pounds?

*May 1, 2013*

**English**

I am writing an English paper and I was wondering if one is supposed to always capitalize the word gothic? What are the rules? My paper includes phrases such as: gothic genre gothic mother gothic conventions gothic story gothic characteristics gothic tale When are they ...

*October 5, 2011*

**English**

I have to write an analytical essay discussing how Chaucer's Wife of Bath's Tale and Prolgue present the complex interaction of body and spirit. And I am struggling on a good thesis. From the text, I know that she definitely indulges in the bodily, as she constantly ...

*October 2, 2011*

**science**

a young girl with a mass of 46 kg is hanging motionless from a tree branch. what is the net force on the girl

*December 5, 2010*

**science**

what is the power of a machine that does 1800 N-m of work per minute?

*October 11, 2010*

**Grade 11 Functions**

A rectanguler field with an area of 8000 meters squared is enclosed by 400 meters of fencing.Determine the dimessions of the field to the nearest tenth of a meter

*April 14, 2010*

**MATHS**

NOT RIGHT !

*September 13, 2009*

**psy/230**

Wholeheartedly agree with you all. A lot of reading and one comes away more confounded by the explanation. Just when you think you have grasped the meaning it gets more confounded. The instructor no where to be found and does not answer questoins in a timely fashion needless ...

*October 30, 2008*

**MATH!!!!!!!**

PLEASE HELP!!! A standard doorway measures 6 feet 8 inches by 3 feet. What is the largest dimension that will fit through the doorway without bending??? o and i also need work shown Do you mean what length of stick or pole would fit through a doorway? If so, find the ...

*May 9, 2007*

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