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2 years ago

At the bank , mr smith changes a e5 note for 20p pieces . how many 20 pieces does he have

Mathematics

1 answer:

Anastaziya [24]2 years ago

7 0

Answer:

it should be 25

Step-by-step explanation:

£500 = 500p

500 ÷ 20 = 25

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You’re working in the sedan section of dean’s car dealership. A customer makes a down payment of 15% on a new car that costs $13

Shkiper50 [21]

Answer:

Convert 15 % to a decimal.

Then multiply 0.15 x 13450. That means the answer is $2,017.50

Please mark brainliest if this helped.

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2 years ago

A pet store has 15 birds and 75 fish.

Ludmilka [50]

Answer:

1/5

Step-by-step explanation:

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1 year ago

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Researchers from Dartmouth Medical School conducted a study in 2003 to look at the connection between watching actors smoking in

docker41 [41]

Answer:

The 95% confidence interval for the proportion of adolescents who tried smoking for the first time because of exposure to smoking in the movies is (0.37, 0.40).

Step-by-step explanation:

A confidence interval is an interval estimate of the population parameter. The confidence interval has a certain probability of consisting the true value of the parameter.

The (1 - α) % confidence interval for the population proportion (p) is given by:

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

The information provided is:

$n = 6522\\\hat p=0.38\\z_{\alpha/2}=z_{0.05/2}=z_{0.025}=1.96$

*Use a z-table for the critical value.

Construct the 95% confidence interval for the proportion of adolescents who tried smoking for the first time because of exposure to smoking in the movies as follows:

$CI=\hat p\pm z_{\alpha/2}\times \sqrt{\frac{\hat p(1-\hat p)}{n}}\\=0.38\pm 1.96\times \sqrt{\frac{0.38(1-0.38)}{6522}}\\=0.38\pm 0.0118\\=(0.3682, 0.3918)\\\approx (0.37, 0.40)$

Thus, the 95% confidence interval for the proportion of adolescents who tried smoking for the first time because of exposure to smoking in the movies is (0.37, 0.40).

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2 years ago

The perimeter of a triangle equals 8 inches. Two of its sides are equal and each of them is 1.3 inches bigger than the third sid

mafiozo [28]

Let's call the lengths of our two types of sides $x$ and $y$ .

The two sides will that our 1.3 inches bigger than the third side will be have length x, and the length of the other side will be known as y. Thus, $x = y + 1.3$ .

Considering this, we can add our sides together and set this value equal to 8, given the information in the problem:
$(y + 1.3) + (y + 1.3) + y = 3y + 2.6 = 8$

Now, let's solve for y.
$3y + 2.6 = 8$
$3y = 5.4$
$y = 1.8$

Now, we are not done yet. We must determine the true lengths of all of our sides. Using the equation we found earlier, the length of the two bigger sides is $y + 1.3 = 1.8 + 1.3 = \boxed{3.1}$ inches and the length of our smaller side is simply $\boxed{1.8}$ inches.

To verify, we can add these sides together and check that they equal 8:
3.1 + 3.1 + 1.8 = 8 ✔

5 0

2 years ago

In circle N, KL ≅ ML. Circle N is shown. Line segments N J, N M, N L, and N K are radii. Lines are drawn to connect each point o

Sergeu [11.5K]

Answer:

$arc\ JM=132^o$