Answer:
<h2>
$ 30.8</h2><h2>
</h2>
Step-by-step explanation:
ratio and proportion:
<u>3 tickets</u> = <u> 7 tickets </u>
$13.20 x
then cross multiply: 3 (x) = 13.20 (7)
simplify: 3x = 92.4
solve for x = 92.4 / 3
x = $ 30.8
therefore,
7 tickets costs $ 30.8
Answer:
<h2>a) approximately 133 graduates</h2><h2>b) approximately 120°</h2>
Step-by-step explanation:
a) the number of graduates planning to continue studying :
= (37 1/2% + 12 1/2% + 16 2/3%) × 200

= (37.5 + 12.5 + 16.666666666667)×2
= 133.333333333334
…………………………………
b) the measurement of the angle representing those who plan to work :
= (360× 33 1/2)÷100
= (360× 33.333333333333)÷100
=119.999999999999
The answer to the question is A
15, look at the attachment for work
Answer:
50π cm²/s
Step-by-step explanation:
Area of the circle A = πd²/4
Rate at which the area is changing with time is expressed as;
dA/dt = dA/dd*dd/dt
dd/dt is the rate at which the diameter is changing with time
dd/dt = 5cm/sec
dA/dd = 2πd/4
dA/dd = πd/2
Given that d = 20cm
dA/dt = dA/dd*dd/dt
dA/dt = πd/2*5
dA/dt = 20π/2 *5
dA/dd = 10π * 5
dA/dd = 50π cm²/s
Hence the area is changing at the rate of 50π cm²/s