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marysya [2.9K]
3 years ago
11

The mother of a teenager has heard a claim that 23​% of teenagers who drive and use a cell phone reported texting while driving.

She thinks that this rate is too high and wants to test the hypothesis that fewer than 23​% of these drivers have texted while driving. Her alternative hypothesis is that the percentage of teenagers who have texted when driving is less than
Mathematics
1 answer:
inessss [21]3 years ago
8 0

Answer:

H1 : p < 0.23

Step-by-step explanation:

The parameter percentage Given in the scenario above is 23%;

Proportion = 23/100 = 0.23

The null hypothesis ; H0 will support the claim ; Hence, H0 is expressed as ;

H0 : p = 0.23

Thw alternative hypothesis ; will negative the claim of the null hypothesis ; Hence, H1 will be ;

H1 : p < 0.23

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Distance between the point (-2, 4) and (10, -1)?
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Answer:

13

Step-by-step explanation:

Use the distance formula to determine the distance between two points.

d=√((x_2-x_1)²+(y_2-y_1)²)

√((10)-(-2))^2+(-1)-(4)^2)

√(144+25)

√(169)

13

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3 years ago
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A bicycle helmet has a selling price of $50. The helmet is discounted 30% off the selling price. The sales tax rate is 6%. What
Andrei [34K]
Convert 30% to a decimal by dividing by 100 = 0.30

Multiply by the cost of the helmet, $50
50 x 0.30 = $15, the amount of the discount.

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3 years ago
En la escuela Francisco I. Madero de ciudad Delicias, llevaron a cabo el festejo para
REY [17]

Answer:

The number of unsold cakes was 2

Step-by-step explanation:

<u><em>The question in English is</em></u>

In the school Francisco I. Madero of Ciudad Delicias, the celebration was held for  commemorate the arrival of spring, after the parade the stalls were set up  of the kermesse. The first grade group bought 8 cakes and sold 3/4 of the total.

How much of the cake was not sold?

Let

x ----> number of cakes sold

y ----> number of cakes that didn't sell

we know that

The first grade group bought 8 cakes

so

x+y=8 -----> equation A

The first grade group sold 3/4 of the total.

so

x=\frac{3}{4}(x+y) ---> equation B

substitute equation A in equation B

x=\frac{3}{4}(8)=6

Find the value of y

6+y=8

y=2

therefore

The number of unsold cakes was 2

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Step-by-step explanation:

5 0
3 years ago
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Effectus [21]

Answer:

y₀.₉₅ = 3659

Step-by-step explanation:

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attached below is the remainder of the solution

5 0
3 years ago
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