Tuesday
December 10, 2013

# Posts by jo

Total # Posts: 354

Calculus
A particle is moving along the curve whose equation is (xy^3)/(1+y^2)= 8/5. Assume the x-coordinate is increasing at the rate of 6 units/second when the particle is at the point (1,2). At what rate is the y-coordinate of the point changing at that instant? Is it rising or fal...

Physics
An autographed baseball rolls off of a 0.85 m high desk and strikes the floor 0.68 m away from the desk. How fast was it rolling on the desk before it fell off? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s

Physics
In a portable deﬁbrillator, energy is stored in a capacitor charged to a high potential diﬀerence. The capacitor is discharged through the patient’s body in a short, high-powered pulse. a) The capacitor in a portable deﬁbrillator is charged to 5000 V ...

statistics
given the following population data, x=17,13,23,15,19,19,21,28 calculate the z score value for a score of 18.

math
what is the rule for input 36 output 9 input 17 output 9 input 24 output1 input 18 output 0

maths
When Sandy decreased her savings by 75% and Gene increased hers by 40%, they would save \$280 each. What were their total savings at first?

maths
Amy had 20% more money than John. After she spent 50% of her money, she had \$72 less than John. How much money had she left?

Maths
At present, the ratio of Ann's age to Pamela's age is 4:3. Six yrs ago, their total age was 72yrs. what is Pamela's presnt age?

Maths P5
Mr Neo has fewer than 200 sweets. He wants to give his class an equal number of sweets. If he gives each pupil 3 sweets, he will have 70 left over. If he gives 5 sweets, he will need 10 more sweets. How many pupils are there in the class? How many sweets does Mr Neo have?

Maths P5
Cindy went to the store with just enough money to buy 11 files.However, she bought only 8 files and spent the rest of her money on 24 pens and rulers. The ratio of the number of pens to rulers was 3:5. Each ruler costs \$0.80. Each pen costs \$0.40 more than a ruler.How much did...

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