100 POINTS A regular triangular pyramid has slant height 6 cm and base edges of length 15 cm. Find :Volume of the pyramid? Surface area of the pyramid?

Triangular pyramids find the volume by using the equation V=(1/3)AH

Where A = area of base (hint: cut in half and treat like a right triangle knowing the hypotenuse and 1 side)

And H = height

1

the correct answer is you spend $55.78 more in a brand store that buy ing in a normal store.

step-by-step explanation:

brand = spend   $ 135.85 total

store = spend $80.07 total

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92