The Tetrahedron Superyacht designed by Jonathan Schwinge is a regular tetrahedron with edges 20 m long. The distance r from one corner to the center of the base is 11.5 m. What is the vertical height, h, of the tetrahedron?

Evaluate the expression when a=2 and c=-5. 8a-c=

miley is trying to solve the following riddle: "the sum of three consecutive integers is 84. what are the integers?"

Write the numerical expressions in words. Then, solve (98-78) times 11

Why aren't credit cards included in m1 or m2 definition of money?

Which of the transformation preserve distance and angle measure?

Porphyrin is a pigment in blood protoplasm and other body fluids that is significant in body energy and storage. Let x be a random variable that represents the number of milligrams of porphyrin per deciliter of blood.

In the aftermath of a car accident, it is concluded that one driver slowed to a halt in 20 seconds while skidding 1775 feet. If the speed limit was 60 miles per hour, can it be proved that the driver had been speeding?

Hannah is having a party and is inviting both girls and boys. The number of boys is 2 less than 3 times the number of girls. What can be the greatest number of boys invited if there are only 14 kids invited to the party?

Matt has two fish tanks. The total volume of his two fish tanks is equal to the volume of Kelsey's one fish tank that you calculated above. The first of Matt's fish tanks has a length of 4 feet, a width of 1 foot, and a height of 2 feet.

Justine swims freestyle at a pace of 150 laps per hour. Justine swims breaststroke 20 laps per hour slower than she swims butterfly.