Answer:
10.3
Step-by-step explanation:
Triangle E D F is shown. The length of E F is 8 and the length of D F is 5. Angle E D F is 116 degrees and angle D F E is 31 degrees.
Trigonometric area formula: Area = One-half a b sine (C)
What is the area of triangle DEF? Round to the nearest tenth of a square unit.
10.3 square units
18.0 square units
20.0 square units
20.6 square units
Answer: A = 15
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The function for the number of calories burnt as a function of time is:
c(t) = 425 t
And for the number of calories burnt while boxing with gloves is:
b(c) = 1.1c
Therefore, the composite function that expresses the calories, as a function of time, Leon burns while boxing with heavy gloves is:
b[c(t)] = 1.1 (425 t)
b[c(t)] = 467.5 t
The answer is the third option
