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3 years ago

11-5 practice volumes of pyramids and cones

Mathematics

1 answer:

Minchanka [31]3 years ago

4 0

Answer:

Step-by-step explanation:

Volume for a cone = 1/3 * pi * $r^{2}$ * h

Volume for a pyramid = 1/3 * area of base * h

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Create an equivalent ratio to 35:40 by dividing both sides by 5. What is the equivalent ratio?

Mumz [18]

Answer:

35:40 = 7:8 is the equivalent ratio.

Step-by-step explanation:

35 / 5 = 7

40 / 5 = 8

7:8

5 0

3 years ago

Read 2 more answers

5 litres of paint cost 210 work out the cost of 50 L of paint

krek1111 [17]

Answer:

2100

Step-by-step explanation:

5/210=50/x

x= 50*210 / 5

x= 2100

4 0

3 years ago

1) Gena’s new outfit originally cost $75. She received 20% off. How much did Gena’s outfit cost?

Paha777 [63]

Answer:

1. $60

2. 600 Calories were burned

3. D

Step-by-step explanation:

1. $75 x .20=$15

75-15=$60

2. What I started with is 200/40=5 calories burned per min

60 plus 60=120

5x120=600

3. It's the only option that has something decreasing. and there is a -5 which means it's getting subtracted or its decreasing.

6 0

3 years ago

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A study sampled 350 upperclassmen (Group 1) and 250 underclassmen (Group 2) at high schools around the city of Portland. The stu

iVinArrow [24]

Answer:

$-0.061 < P_1 -P_2< 0.025$

Step-by-step explanation:

Give data:

$n_1 = 350$

$n_2 =250$

$x_1 = 23$

$x_2 = 21$

$\hat{P} 1 = \frac{x_1}{n_1} = \frac{23}{350} = 0.066$

$\hat{P} 2 = \frac{x_2}{n_2} = \frac{21}{250} = 0.084$

for 95% confidence interval

$\alpha = 1 - 0.95 = 0.05 and \alpha/2 = 0.025$

$z_{\alpha/2} = 1.96$ from standard z- table

confidence interval for P_1 and P_2 is

$\hat{P} 1 - \hat{P} 2 \pm z_{\alpja/2} \sqrt{\frac{\hat{P} 1(1-\hat{P} 1)}{n_1} +\frac{\hat{P} 2(1-\hat{P} 2)}{n_2}}$

$(0.066 - 0.084) \pm 1.96 \sqrt{\frac{0.066(1-0.066)}{350} +\frac{0.084(1-0.084)}{250}}$

$-0.018 \pm 0.043$

confidence interval is

$-0.018 - 0.043 < P_1 -P_2$

$-0.061 < P_1 -P_2< 0.025$

7 0

3 years ago

Please help me with this question.

ruslelena [56]

Answer:

Step-by-step explanation:

-1 ≤ x < 3 Solution set = {-1, 0 ,1 , 2}

-2 < x < 2 Solution set = {-1 , 0 , 1}

Integer values that satisfies both inequalities are -1 , 0 , 1

6 0

3 years ago

Read 2 more answers