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3 years ago

15

At the library you find nine books on a certain topic the librarian tells you that 55% of the books on this topic have been sign

ed out how many books does the library have available on the topic

1 answer:

sleet_krkn [62]3 years ago

4 0

9 x 0.55 = 4.95, which can be rounded to the ones place.

5 books remain.

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TotCo is developing a new deluxe baby bassinet. If the length of a newborn baby is normally distributed with a mean of 50 cm and

Delicious77 [7]

Answer:

<em>The interior length of the bassinet to ensure that 99 percent of newborn babies will fit = 1.7 cm</em>

Step-by-step explanation:

<u><em>Explanation:</em></u>-

<em><u>step(i):</u></em>-

Given mean of population = 50 cm

<em>standard deviation of Population = 5 cm</em>

<em>Given Margin of error = 10 cm</em>

<em>The Margin of error is determined by </em>

<em></em> $M.E = \frac{Z_{\alpha } S.D}{\sqrt{n} }$ <em></em>

<u><em>Step(ii)</em></u><em>:-</em>

<em>Given level of significance ∝ = 99 % or 1 %</em>

Z₀.₀₁ = 2.576

$10 = \frac{2.576 X 5}{\sqrt{n} }$

$\sqrt{n} = \frac{2.576 X 5}{10}$

√n = 1.3

squaring on both sides , we get

<em>n = 1.69≅ 1.7 cm</em>

<u><em> Final answer:</em></u>-

<em>The interior length of the bassinet to ensure that 99 percent of newborn babies will fit = 1.7 cm</em>

4 0

3 years ago

Mary scored 10 points less than Judy in the game. Lucy scored twice as many points as

kodGreya [7K]

The answer for this is 10

6 0

3 years ago

Mrs. Price is making muffins using a total of 500 grams of gluten-free flour. The recipe calls

Nina [5.8K]

Answer:

45/100 and 225 g

Step-by-step explanation

You take the percentage, 45%, and put it over 100.

Multiply the total number of grams, 500, by the percent of oat flour.

5 0

3 years ago

Find the total area for the regular pyramid.<br><br><br><br> T. A. =

Allisa [31]

The total area is:
A = Ab + Al
Where,
Ab: base area
Al: lateral area
We have then:
For the base area:
Ab = (2) * (2)
Ab = 4 units ^ 2
For the lateral area:
Al = (4) * (1/2) * (2) * (root ((1) ^ 2 + (3) ^ 2))
Al = (4) * (root (1 + 9))
Al = 4raiz (10) units ^ 2
Total area:
A = 4 + 4raiz (10)
Answer:
A = 4 + 4raiz (10)

7 0

3 years ago

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The figure shows two parallel lines KL and NO cut by the transversals KO and LN.

Sever21 [200]

Answer:

(A)

Step-by-step explanation:

From the given figure, we have to prove whether the two given triangles are congruent or similar.

Thus, From the figure, ∠3=∠4 (Vertically opposite angles)

Since, KL and NO are parallel lines and KO and LN are transversals, then

measure angle 1= measure angle 5 that is ∠1=∠5(Alternate angles).

Thus, by AA similarity rule, ΔKLM is similar to ΔONM.

Thus, Option A that is Triangle KLM is similar to triangle ONM because measure of angle 3 equals measure of angle 4 and measure of angle 1 equals measure of angle 5 is correct.

8 0

3 years ago

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