Find the area of the surface of revolution generated by revolving the curve y = 3 sqrt (x), 0 < = x < = 4, about the x-axis.
okay, so i've set up the integral like this: 2pi ∫[0,4] (3 sqrt ((1+(1/ which is coming out to 108.5, but that's not giving me the right answer. can you me set up the integral correctly or tell me what i'm doing wrong?

The label on the car's antifreeze container claims to protect the car between ? 40°c and 125°c. to convert celsius temperature to fahrenheit temperature, the formula is c = 5 over 9 (f ? 32). write and solve the inequality to determine the fahrenheit temperature range at which this antifreeze protects the car. ? 40 > 5 over 9 (f ? 32) > 125; ? 40 > f > 257 ? 40 < 5 over 9 (f ? 32) < 125; ? 40 < f < 257 ? 40 < 5 over 9 (f ? 32); ? 40 < f 5 over 9 (f ? 32) < 125; f < 257

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?

The length of an intercepted arc of a central angle of a circle is 4 cm. if the radius of the circle is 5 cm what is the measurement of the central angle to the nearest whole degree