The area of a rectangle is shown through length times width. Being so, 13.7 times 10.5 equals 143.85 m^2.
Answer:
a) 1/27
b) 16
c) 1/8
Step-by-step explanation:
a) 
One of the properties of the exponents tells us that when we have a negative exponent we can express it in terms of its positive exponent by turning it into the denominator (and changing its sign), so we would have:

And now, solving for x = 9 we have:

b) 
This is already a positive rational exponent so we are just going to substitute the value of y = 8 into the expression

c) 
Using the same property we used in a) we have:

And now, solving for z = 16 we have:

He needs 25 cm^3 of sand
good luck
Answer:
9 yd
Step-by-step explanation:
15 yd - 6 yd = 9 yd
Please mark my answer as brainiest