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vladimir1956 [14]
3 years ago
15

There are 17 occupied seats on the bus,11 seats are empty. What is the ratio of number of occupied seats to empty seats?

Mathematics
1 answer:
kifflom [539]3 years ago
8 0
17:11 is the answer :)
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How do I do question 9 & 11? Please help thank you!
Novay_Z [31]
<h2>9.</h2><h3>Given</h3>
  • sphere with radius 15 cm
<h3>Find</h3>
  • linear approximation to the volume when the radius increases 0.4 cm
<h3>Solution</h3>

The equation for volume of a sphere is

... V = (4/3)π·r³

Differentiating gives

... dV = 4π·r²·dr

Filling in the given numbers gives

... change in volume ≈ 4π·(15 cm)²·(0.4 cm)

... = 360π cm³ ≈ 1130.97 cm³ . . . . . . volume of layer 4mm thick

<h2>11.</h2><h3>Given</h3>
  • an x by x by 2x cuboid with surface area 129.6 cm²
  • rate of change of x is 0.01 cm/s
<h3>Find</h3>
  • rate of change of volume
<h3>Solution</h3>

The area is that of two cubes of dimension x joined together. The area of each such cube is 6x², but the two joined faces don't count in the external surface area. Thus the area of the cuboid is 10x².

The volume of the cuboid is that of two cubes joined, so is 2x³. Then the rate of change of volume is

... dV/dt = (d/dt)(2x³) = 6x²·dx/dt

We know x² = A/10, where A is the area of the cuboid, so the rate of change of volume is ...

... dV/dt = (6/10)A·dx/dt = 0.6·(129.6 cm²)(0.01 cm/s)

... dV/dt = 0.7776 cm³/s

5 0
3 years ago
Please help answer these questions.​
timofeeve [1]
16. M = 1/5

17. M =3

18. Slope 1/4 and y-intercept (0,2)
7 0
3 years ago
What is the constant rate change shown in the graph below?​
ohaa [14]
The constant rate of change is 5 because
3 0
3 years ago
Read 2 more answers
PLS I'LL DIRECTLY MARK YOU BRAINLIST (OPTIONS ARE ON THE SECOND SLIDE )
antoniya [11.8K]
The answer is A
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7 0
2 years ago
Two factors of 24 that add up to 11
Vadim26 [7]
Simple....

8*3=24

8+3=11

Thus, your answer.
8 0
3 years ago
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