Find the surface area of the portion s of the cone z2=x2+y2, where z≥0, contained within the cylinder y2+z2≤9.

When 142 is added to a number the result is 64 more then 3 times the number. option 35 37 39 41

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

The water company charges a residential customer $41 for the first 3,000 gallons of water used and $1 for every 200 gallons used over 3000 gallons. if the water bill was $58 how many gallons of water were usedanswersa 3400 gallonsb 6000 gallonsc 6400 gallons d 7000 gallons