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Vanyuwa [196]
2 years ago
8

Lydia wants to buy new boots that cost $130. She has saved 82% of what she needs to buy the boots. How much money has she saved

so far? How much does Lydia still need to save?
Mathematics
1 answer:
Lorico [155]2 years ago
6 0

Answer:

Answer:

44 = 12 + M

Step-by-step explanation:

Start with your final amount that everything else is going to equal

44 =

Then, add the $12 that is already saved to the other side\

44 = 12

But, that equation is not true yet, so we have to add the amount of money that she still needs to save

44 = 12 + M

That equation shows that the money she has saved ($12), plus the amount she still has to save will equal the amount she needs.

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In the 1980’s, a clinical trial was conducted to determine if taking an aspirin daily reduced the incidence of heart attacks. Of
zubka84 [21]

There is enough evidence to conclude that taking aspirin cannot  reduces the chance of cancer.

Given sample size of patients take aspirin 11037, sample size of patients who have assigned placebo group be 11034. 104 doctors who take aspirin had a heart attack, 189 doctors had placebo had heart attacks.

First we have to form hypothesis.

H_{0} :p{1} -p_{2} =0

H_{1}:p_{1} -p_{2} < 0

We have to find the respective probabilities.

p_{1}=104/11037

=0.0094

p_{2}=189/11034

=0.0171

Now their respective margin of errors.

s_{1}=\sqrt{ {(0.0094*0.9906)/11037}

=0.0009

s_{2}=\sqrt{0.0171*0.9829}

=0.0011

Hence the distribution of the differences,they are given by:

p=p_{1} -p_{2}

=0.0094-0.0171

=-0.0077

S=\sqrt{s_{1} ^{2}+s_{2} ^{2}  }

=\sqrt{(0.0009)^{2} +(0.0011)^{2} }

=0.00305

z=(p -f)/S (In which f=0 is the value tested at the null hypothesis)

=(-0.0077-0)/0.00305

=-2.52

p value will be 0.005.

p value of 0.05 significance level.

z=1.96.

1.96>0.005

So we will reject the null hypothesis which means it cannot reduce the whole chance of becomming a heart attack.

Hence there is enough evidence to conclude that taking aspirin cannot  reduces the chance of cancer.

Learn more about t test at brainly.com/question/6589776

#SPJ4

6 0
1 year ago
A boat cruise is 32 miles long. There are 40 sight-seeing stops evenly spread throughout the cruise. The boat covered 13 of the
Sauron [17]
For the first question, divide 32 by 40 and it should equal .8 miles. Then, for the second question, multiply .8 by 13 and it should equal 10.4 miles.
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3 years ago
Identify the place of the 4 in the number: 45,348
MAXImum [283]
Ten thousands and tens place.
7 0
3 years ago
5.8 cm converted into cm
agasfer [191]

Answer:

but it is already in cm

5.8 cm is 5.8 cm   but if you want mm

5.8 cm is 58 mm

Step-by-step explanation:

8 0
3 years ago
Christopher bought 3 toy trucks that costs $14.25 each. He used a coupon for 15% off of the total purchase. Rounded to the neare
densk [106]

Answer: $36.3

Step-by-step explanation:

Since Christopher bought 3 toy trucks that costs $14.25 each. Then, the cost of the three toys will be:

= 3 × $14.25

= $42.75

Then, if he used a coupon for 15% off of the total purchase, then the final purchase will be:

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= $36.3375

= $36.3

5 0
2 years ago
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