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Svetradugi [14.3K]

3 years ago

6

Students in the sixth grade are raising money for an end of year camping trip. So far they have raised 240. This is 2/5 of the c

ost the trip. How much does the trip cost.

1 answer:

Sauron [17]3 years ago

6 0

Answer: $600

Step-by-step explanation:

2/5 = 240 of the trip

1/5 = 120 of the trip

3/5 = 360 of the trip

4/5 = 480 of the trip

5/5= the whole trip $600

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f the original price of a table is p and the sale price of the table is p−0.2p, which other expression represents the sale price

Sphinxa [80]

Answer:

0.2p is the correct

6 0

3 years ago

The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the e

marusya05 [52]

Answer:

The estimation for the proportion of tenth graders reading at or below the eighth grade level is given by:

$\hat p =\frac{955-812}{955}= 0.150$

$0.150 - 1.64 \sqrt{\frac{0.150(1-0.150)}{955}}=0.131$

$0.150 + 1.64 \sqrt{\frac{0.150(1-0.150)}{955}}=0.169$

And the 90% confidence interval would be given (0.131;0.169).

Step-by-step explanation:

We have the following info given:

$n= 955$ represent the sampel size slected

$x = 812$ number of students who read above the eighth grade level

The estimation for the proportion of tenth graders reading at or below the eighth grade level is given by:

$\hat p =\frac{955-812}{955}= 0.150$

The confidence interval for the proportion would be given by this formula

$\hat p \pm z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}$

For the 90% confidence interval the significance is $\alpha=1-0.9=0.1$ and $\alpha/2=0.05$ , with that value we can find the quantile required for the interval in the normal standard distribution and we got.

$z_{\alpha/2}=1.64$

And replacing into the confidence interval formula we got:

$0.150 - 1.64 \sqrt{\frac{0.150(1-0.150)}{955}}=0.131$

$0.150 + 1.64 \sqrt{\frac{0.150(1-0.150)}{955}}=0.169$

And the 90% confidence interval would be given (0.131;0.169).

8 0

3 years ago

Cindys grandmother is five times her age. Find each of their ages if the sum of their ages is 90

yan [13]

Answer:

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Step-by-step explanation:

90 divide 6 equal to 15

6 0

3 years ago

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yanalaym [24]

Answer:

540°.

Step-by-step explanation:

On a unit circle, cos θ = -1 at 180°.

However, cos θ has a period of 2π, or 360°. This means that cos θ will equal to -1 again after 2π.

To solve for the angle:

180° + 360° = 540°. This is the next angle at which cos θ = -1.

7 0

3 years ago

Read 2 more answers

How much will it cost if 12 people come to the party?

saveliy_v [14]

Answer:

y=5x+25

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y=85

Step-by-step explanation:

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3 years ago