The question is in the picture. PLEASE HELP!!!! Thank you!!!;);)
1 answer:
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Answer:
6.6 cm and 14.6 cm
Step-by-step explanation:
(a)
the length of arc AB is calculated as
AB = circumference of circle × fraction of circle
= 2πr ×
= 2π × 4 ×
= 8π ×
=
≈ 6.6 cm ( to the nearest tenth )
(b)
the perimeter (P) of sector AOB is
P = r + r + AB = 4 + 4 + 6.6 = 14.6 cm
When you're given a point and the slope of a line, it is often easiest to write its equation in point-slope form.
This is
, where 
is the ordered pair for the point you are given and m is the slope.
Here, you would write
. Then, you simplify to get to slope-intercept form, which is 
, where b is the y-intercept.
The correct answer is A.
This is
Here, you would write
The correct answer is A.
Answer:
y = -0.2x + 8
Step-by-step explanation:
To write a linear function, calculate the rate of change of the gallon of water leaving the tank and the starting level.
The function will describe the number of gallons over time or (time, gallons).
This means the function has data points (1, 7.8) and (9, 6.2).
Use the rate of change or slope formula to calculate it.
This means that for the formula y = mx+b then m = -0.2.
This also means that after losing 0.2 gallons the first hour it was at 7.8. So the starting value is 8 gallons.
The equation is y = -0.2 x + 8.