What is the missing number in this pattern?

1, 4, 9, 16, 25, 36, 49, 64, 81,

Simple geometry can compute the height of an object from the object's shadow length and shadow angle using the formula: tan (angleElevation) = treeHeight / shadowLength. Given the shadow length and angle of elevation, compute the tree height.

Powers of products and quotients. simplify (7y^4) ^2

Find the minimum of the set of data. 36, 34, 37, 29, 37, 39, 37, 25, 31, 32, 28

Substitute 4 and then - 4 for x in the equations y=x+1 and 2y-2+=2x. Describe the results

Wha geometric reason is accepted without proof in a logical system

Simplify the following: 6x - 6y + 4x - 3y - 5x + 7x

Alfred is practicing typing. The first time he tested himself, he could type 30 words per minute. After practicing for a week, he could type 33 words per minute. After two weeks he could type 36 words per minute.

the perimeter of the flag is 2340 ft. what is the flags width and length if the length is 330 ft. greater than the width

48% = looking for a fraction

Boxes of shablamceral originally cost $3.00. The store has reduced the price by 25%. You have a coupon for an additional 20% off the already discounted price. What is the final price of the cereal