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AnnyKZ [126]
2 years ago
9

To mail a letter, it costs $0.48 for the first ounce, then $0.20 for each ounce thereafter. Find the cost to mail a letter that

weighs 4.95 ounces.
Mathematics
1 answer:
avanturin [10]2 years ago
4 0

Answer:

2.23

Step-by-step explanation:

0.48 for the first ounce, and then 0.20 for the rest.

0.48 + (0.20 x 3) = 1.08

.95 ounces? We round that to 1.00 ounces.

1.08 + 1 = 2.08 BUT

<em>It's .95, isn't it? We need to do another part. </em>

.95 divided by 0.20 (the ounces by the cost) = 4.75

You need to convert the 4.75 to a fraction, so 4.75 becomes 4 3/4.

subtract the missing amount (to make the fraction equal to 1) from the cost, so

1/4 of 0.20 is 0.5. Subtract 0.5 from 0.20 makes it 0.15.

<em>Finally, add the costs.</em>

2.08 + 0.15 = 2.23.

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25 time 12 is 300. divide 300 by 2 and get 150.

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You believe that eating an apple a day is healthy and want to design an experiment to find out. You have available 40 volunteers
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The best design for this experiment would be a repeated measures design. This is ideal to determine if eating an apple makes you healthy.

<h3>What is an experimental design?</h3>

An experimental design refers to the general structure of an experiment including how people are distributed into the control and experimental group to test a specific phenomenon.

<h3>What is a repeated measures design?</h3>

In a repeated measures design all participants are both parts of the control group, in this case, people who do not eat apples, and the experimental group, or people who eat apples.

<h3>What does this design imply?</h3>

In the case of determining if eating an apple every day, this design implies:

  • All participants will be asked to not eat apples every day for a specific period such as one or two months, and health levels will be measured during this time.
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Howard is designing a chair swing ride. The swing ropes are 4 44 meters long, and in full swing they tilt in an angle of 2 3 ∘ 2
qaws [65]

Question:

Howard is designing a chair swing ride. The swing ropes are 4 meters long, and in full swing they tilt in an angle of 23°. Howard wants the chairs to be 3.5 meters above the ground in full swing. How tall should the pole of the swing ride be? Round your final answer to the nearest hundredth.

Answer:

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Step-by-step explanation:

Given:

Length of rope, L = 4 m

Angle = 23°

Height of chair, H= 3.5 m

In this question, we are to asked to find the height of the pole of the swing ride.

Let X represent the height of the pole of the swing ride.

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cos \theta = \frac{h}{L}

Substituting figures, we have:

cos(23) = \frac{h}{4}

Let's make h subject of the formula.

h = 4cos(23) = 3.68

The length of pole from the top of the swing ride is 3.68 meters

To find the height of the pole of the swing ride, we have:

X = h + H

X = 3.68 + 3.5

X = 7.18

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