4 years ago

PLEASE HELP 13 POINTS

Mathematics

1 answer:

aalyn [17]4 years ago

3 0

Circumference of circle = π × Diameter

= π × 18 cm

= 56.54867 or 56.54 to 1 dp

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12.42×28.6 = estimate then find the pruduct

AveGali [126]

12x29=348 is the answer

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3 years ago

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5. A sphere has a diameter of 16 inches. What is the<br> volume of the sphere?

oksian1 [2.3K]

Answer:

2144.7 inches³

Step-by-step explanation:

use formula for calculating volume of sphere which is 4/3×π×r3

since diameter is 16 inches we divide it by 2 to get the radius

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2 years ago

Water is added or drained from a tank each day. The first day, 9/10 of a gallon is added to the empty tank. The second day, 7/10

lorasvet [3.4K]

Answer:

Step-by-step explanation:

9/10+(−7/10)+8/10+(−6/10)+3/10+(−1/10)+2/10.

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2 years ago

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In order to officailly bid on a contract, a contractor wants to be 95% confident that his error is less than two hours in estima

iVinArrow [24]

Answer: 20

Step-by-step explanation:

Formula to find the sample size : $n=(\dfrac{\sigma\times z_{\alpha/2}}{E})^2$

Given : Significance level : $\alpha=1-0.95=0.05$

Critical value : $z_{\alpha/2}=1.96$

Margin of error : $E$

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Then, we have

$n=(\dfrac{4.5\times(1.96)}{2})^2=19.4481\approx20$

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4 years ago

Complete the equation of the line whose interpret is (9.0) and slope is -2. Remember to use y=mx+b format

kenny6666 [7]

Answer:

y = - 2x + 18

Step-by-step explanation:

Step 1:

y = mx + b Slope Intercept Form

Step 2:

y = - 2x + b Input Slope Value

Step 3:

0 = - 2 ( 9 ) + b Input x and y values

Step 4:

0 = - 18 + b Multiply

Step 5:

b = 18 Add 18 on both sides

Answer:

y = - 2x + 18

Hope This Helps :)

7 0

3 years ago