physical science
Brad rides his bike 20 km. He covers the distance in 45 minutes (0.75 hours). What is his speed in kilometers per hour? A.44 km/hr B.15 km/hr C.9.0 km/hr D.27 km/hr
Calculus
find the second derivative of f(x)=3/(x^2+12)
pre-algebra
when rounding to the nearest cent does it have to be to right or left or does it matter?
math
Ryan takes 12 minutes to rake up and bag a pile of leaves. His sister Kareesa takes twice as long. How many minutes would it take both of them working together to complete 10 bags of leaves
math
What does a boy who likes to play with switches do?
math
12 tablespoons cause 16/4=4 so, 4x3=12!
math
sqrt(75)=sqrt(25)sqrt(3) which simplifies to 5 times sqrt(3) so 6x5xsqrt(3)= 30 sqrt(3)
Calculus
Given f"(x)=-25sin(5x)and f'(0)=0 and f(0)=4. Find f(pi/2)
math
30/40=.75 .75x100= 75 percent
Physics
A solid cylindrical disk has a radius of 0.18 m. It is mounted to an axle that is perpendicular to the circular end of the disk at its center. When a 40-N force is applied tangentially to the disk, perpendicular to the radius, the disk acquires an angular acceleration of 90 ra...
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