Evaluate the expression -15 - -12
2 answers:
Answer: -3
Step-by-step explanation: To subtract the integers -15 - (-12), it's important to understand that when we have minus a negative, we can change it to plus a positive so -15 - (-12) becomes -15 + (+12).
So starting at 0 on our number line, -15 moves us 15 units to the left and +12 moves us 12 units back to the right and we end up at -3.
So -15 - (-12) or -15 + (+12) is -3.
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Surface area of the cylinder = 816.4 sq. ft.
Solution:
Height of the cylinder = 21 ft
Diameter of the cylinder = 10 ft
Radius of the cylinder = 10 ÷ 2 = 5 ft
Use the value of = 3.14
Surface area of the cylinder =
Substitute the given values in the surface area formula, we get
Surface area of the cylinder
ft²
Hence the surface area of the cylinder is 816.4 sq. ft.