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using formulas to find values: stopping distance, ball ht.,  TOPIC_SOLVED

1) The distance D in feet it takes a car travelling at x mph to come to a full stop after hitting the brakes is given by D=1.26x^2 + 0.075x. Estimate the stopping distance for a car travelling at 40mph. 2) During the first seconds, the height h in feet of a baseball after t seconds is given by h = -...
by nastydahitman
on Fri Sep 02, 2011 9:22 pm
 
Forum: Beginning Algebra
Topic: using formulas to find values: stopping distance, ball ht.,
Replies: 3
Views: 1528

exponents: converting to sci. notation, simplifying x * x^-7  TOPIC_SOLVED

1) Express the answer in scientific notation to two decimals: The earth is approx. 92,900,000 miles from the sun. If 1mile = 1.61 x 10^3m, what is the distance to the sun in meters? 2) Simplify: x * x^-7 (Do not use negative exponents in the answer.) 3) Write an equivalent expression using positive ...
by nastydahitman
on Fri Sep 02, 2011 9:31 pm
 
Forum: Pre-Algebra
Topic: exponents: converting to sci. notation, simplifying x * x^-7
Replies: 1
Views: 1247

Re: Find two equivalent expressions for the opposite of the  TOPIC_SOLVED

Not really sure, I just know one of the expressions is -(-7x^2+4)

I just need help figuring out the other one
by nastydahitman
on Fri Sep 02, 2011 10:31 pm
 
Forum: Pre-Algebra
Topic: Find two equivalent expressions for the opposite of the poly
Replies: 3
Views: 2063

Re: using formulas to find values: stopping distance, ball h  TOPIC_SOLVED

That's the issue...word problems are my kryptonite. Any help of a walkthrough would be appreciated.
by nastydahitman
on Fri Sep 02, 2011 10:34 pm
 
Forum: Beginning Algebra
Topic: using formulas to find values: stopping distance, ball ht.,
Replies: 3
Views: 1528

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