Area of the hallway = 90 * 7 = 630 ft^2
Since each square foot needs a 1/2 ounce of solution to find the amount of fluid we need we multiply the area by 1/2.
= 630 * 1/2
= <u>315</u> fluid ounces (answer).
speed = 134.213 miles per hour
= 134.213 mi/h
Answer:
5x^2-5
Step-by-step explanation:
Answer:
see explanation
Step-by-step explanation:
Using the double angle identity for sine
sin2x = 2sinxcosx
Consider left side
cos20°cos40°cos80°
= (2sin20°cos20°)cos40°cos80°
= (2sin40°cos40°)cos80°
= (sin80°cos80° )
= (2sin80°cos80° )
= . sin160°
= . sin(180 - 20)°
= . sin20°
= = right side , thus proven