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3 years ago

Complete then message me for 100 points

Mathematics

2 answers:

Mice21 [21]3 years ago

5 0

Answer:

can you crop the photo?

Step-by-step explanation:

it is too small

Alecsey [184]3 years ago

3 0

Answer:

The picture is too small

Step-by-step explanation:

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The penguin nursery is open two times a day: 2/3 hour at noon and 5/12 hour in the afternoon. How much time is the penguin nurse

Molodets [167]

Answer: The answer is $1\dfrac{1}{12}~\textup{hours}.$

Step-by-step explanation: Given that the penguin nursery is open two times in a day, where the number of hours open at the noon and afternoon are respectively given by

$t_n=\dfrac{2}{3}~\textup{hour},\\\\t_a=\dfrac{5}{12}~\textup{hour}.$

Therefore, the total number of hours 't' penguin nursery open every day is given by

$t=t_n+t_a=\dfrac{2}{3}+\dfrac{5}{12}=\dfrac{8+5}{12}=\dfrac{13}{12}=1\dfrac{1}{12}~\textup{hour}.$

Thus, the answer is

$1\dfrac{1}{12}~\textup{hours}.$

5 0

3 years ago

Read 2 more answers

A 4-foot tall child walks directly away from a 12-foot tall lamppost at 2 mph. How quickly is the length of her shadow increasin

xz_007 [3.2K]

Answer:

The length of the shadow is increasing with the rate of 1.5 feet per sec

Step-by-step explanation:

Let AB and CD represents the height of the lamppost and child respectively ( shown below )

Also, let E be a point represents the position of child.

In triangles ABE and CDE,

$\angle ABE\cong \angle CDE$ ( right angles )

$\angle AEB\cong \angle CED$ ( common angles )

By AA similarity postulate,

$\triangle ABE\sim \triangle CDE$

∵ Corresponding sides of similar triangles are in same proportion,

$\implies \frac{AB}{CD}=\frac{BE}{DE}$

We have, AB = 12 ft, CD = 4 ft, BE = BD + DE = 6 + DE,

$\implies \frac{12}{4}=\frac{6+DE}{DE}$

$12DE = 24 + 4DE$

$8DE = 24$

$DE=3$

Now, the speed of walking = 2 mph = $\frac{2\times 5280}{3600}\approx 2.933\text{ ft per sec}$

Note: 1 mile = 5280 ft, 1 hour = 3600 sec

Thus, the time taken by child to reach at E

$= \frac{\text{Walked distance}}{\text{Walking speed}}$

$=\frac{6}{2.933}$

= 2.045 hours

Hence, the change rate in the length of shadow

$= \frac{\text{Length of shadow}}{\text{Time taken}}$

$=\frac{3}{2.045}$

= 1.5 ft per sec.

3 0

3 years ago

At Daria's school 3/8 of students are left handed. If there are 320 students, how many of them are left handed

yKpoI14uk [10]

320/8= 40
40x3= 120
120 students are left handed

4 0

3 years ago

A recipe calls for 5.0 qt of milk. what is this quantity in cubic centimeters?

Ede4ka [16]

To answer this question, you need to understand how to convert unit. In this case, it will be quarts(qt) into centimeter cubic(cm3). A quart is 1/4 gallon and one gallon equal to <span>3 785.4 cm3. Then the calculation would be:
5qt of milk * 0.25 gallon/qt * </span>3 785.4 cm3/gallon= 4731.75 cm3

5 0

3 years ago

Describe and correct the error made in finding the product. <br><br> Please explain what's wrong

qaws [65]

Okay, it's wrong because they forgot to do -2 times 3x.
The correct answer is $3^{2}$ -2x-8
Hope i got is correct!

5 0

3 years ago