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makkiz [27]
2 years ago
12

What is 109 times 15?.. but then u divide it by 25 then lastly add it to 555!! Could someone answer that for Meh?...

Mathematics
2 answers:
anyanavicka [17]2 years ago
7 0

Answer:

620.4

Step-by-step explanation:

To solve this problem:

Lets use the associative and distributive property

(109 x 15 ÷ 25) + 555

    /      \

1,635 ÷ 25  

= 65.4

65.4 + 555 = 620.4

x=620.4

storchak [24]2 years ago
4 0
620.4
hope this helps you
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Answer:

1.6 cm

Step-by-step explanation:

16/10 = 1.6/1 so 1.6 cm in 1 day

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Find the height of the cylinder below if the radius r = 5 m, and the surface area is a = 439.8 m 2
Lostsunrise [7]

10 because radius is half, so 5x2= 10

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3 years ago
Please answer thank you
Naddika [18.5K]

Answer:

<h2>45°</h2>

Step-by-step explanation:

they are opposite angles, same value of 45°

6 0
2 years ago
A doctor released the results of clinical trials for a vaccine to prevent a particular disease. In these clinical​ trials, 200,0
CaHeK987 [17]

Answer:

1) No, there is  not  enough evidence to support the claim that the vaccine was effective (P-value=0.104) .

The null and alternative hypothesis are:

H_0: \pi_1-\pi_2=0\\\\H_a:\pi_1-\pi_2< 0

being the subindex 1 for the experimental group and subindex 2 for the control group.

2) Test statistic z=-1.26

Step-by-step explanation:

This is a hypothesis test for the difference between proportions.

The claim is that the vaccine was effective.

Then, the null and alternative hypothesis are:

H_0: \pi_1-\pi_2=0\\\\H_a:\pi_1-\pi_2< 0

The significance level is 0.01.

The sample 1 (experimental group), of size n1=100000 has a proportion of p1=0.0002.

p_1=X_1/n_1=21/100000=0.0002

The sample 2 (control group), of size n2=100000 has a proportion of p2=0.0003.

p_2=X_2/n_2=30/100000=0.0003

The difference between proportions is (p1-p2)=-0.0001.

p_d=p_1-p_2=0.0002-0.0003=-0.0001

The pooled proportion, needed to calculate the standard error, is:

p=\dfrac{X_1+X_2}{n_1+n_2}=\dfrac{21+30}{100000+100000}=\dfrac{51}{200000}=0.00026

The estimated standard error of the difference between means is computed using the formula:

s_{p1-p2}=\sqrt{\dfrac{p(1-p)}{n_1}+\dfrac{p(1-p)}{n_2}}=\sqrt{\dfrac{0.00026*0.99974}{100000}+\dfrac{0.00026*0.99974}{100000}}\\\\\\s_{p1-p2}=\sqrt{0+0.0000000025}=\sqrt{0.0000000051}=0.000071

Then, we can calculate the z-statistic as:

z=\dfrac{p_d-(\pi_1-\pi_2)}{s_{p1-p2}}=\dfrac{-0.00009-0}{0.000071}=\dfrac{-0.00009}{0.000071}=-1.26

This test is a left-tailed test, so the P-value for this test is calculated as (using a z-table):

P-value=P(z

As the P-value (0.104) is bigger than the significance level (0.01), the effect is not significant.

The null hypothesis failed to be rejected.

There is  not  enough evidence to support the claim that the vaccine was effective.

6 0
2 years ago
Homework ...........
Vesna [10]

Answer:

ab

Step-by-step explanation:

a+b=ab

a=apple b=banana

done.

8 0
2 years ago
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