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2 answers:
Answer:
Area of shaded part = 22 square cm.
Step-by-step explanation:
The area of the shaded region can be calculated by subtracting the area of the triangle by the area of the sector.
Measure of central angle is equal to the measure of arc intercepted.
Area of sector =
Where α denotes the central angle and r denotes the radius of the circle .
Substituting the given values
Area of the sector =
=37.7 square cm.
Area of the triangle =
Where a and b are the sides of the triangle.
Substituting the values we have :
Area of the triangle =
= 15.6 square cm.
Area of shaded part = 37.7-15.6= 22.1 = 22 square cm rounded to nearest square cm.
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Using linear function concepts, it is found that:
- a) It costs $0.1 for each kilowatt hour of electricity used in excess of 250 kWh.
- b) f(90) = 46.6, which is the cost of 340 kWh of consumption in a month.
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A <em>linear function </em>has the format given by:
In which:
- m is the slope, which is the rate of change, that is, how much y changes when x changes by 1.
- b is the y-intercept, which is the value of y when x = 0.
The equation for the cost of h kilowatt hours (kWh) of electricity used in excess of 250 kWh is of:
Item a:
- The slope is of
, which means that it costs $0.1 for each kilowatt hour of electricity used in excess of 250 kWh.
Item b:
250 + 90 = 340.
f(90) = 46.6, which is the cost of 340 kWh of consumption in a month.
A similar problem is given at brainly.com/question/24808124