All categories

3 years ago

sally has scores of 88, 92, 80, and 96. find the score she must make on the next exam to have an average of 90

Mathematics

1 answer:

melisa1 [442]3 years ago

3 0

The score range that sally would have to make a 90 average is 85-100

You might be interested in

A ski area has a high-speed lift that can move 2,400 skiers to the top of the mountain each hour.

jeyben [28]

Answer:

a. h2400 b.33600 c.1.5

Step-by-step explanation:

2400 skiers per hour

then in h hours h x 2400 skiers

in 14 hours 14x2400=33600 skiers

to move 3600 skiers we need 3600/2400=1.5 hours

4 0

3 years ago

Sebastian swam laps every day in the community swimming pool. He swam 45 minutes each day, 5 days each week, for 12 weeks. In th

lord [1]

Answer:

$\text{Average rate}=\frac{\text{40 laps}}{\text{ hour}}$

Step-by-step explanation:

Please consider the complete question.

Sebastian swan laps every day in the community swimming pool. He swam 45 minutes each day, 5 days each week, for 12 weeks. In that time, he swam 1800 laps. What was his average rate in laps per hour?

Let us convert time taken into hours as:

$\text{Days}=5\times 12=60$

$\text{Minutes}=60\times 45$

1 hour = 60 minutes. To convert minutes into hours, we will divide total minutes by 60.

$\text{Hours}=\frac{60\times 45}{60}=45$

Now, we will divide 1800 by 45 to find average rate in laps per hour as:

$\text{Average rate}=\frac{\text{1800 laps}}{\text{45 hours}}$

$\text{Average rate}=\frac{\text{40 laps}}{\text{ hour}}$

Therefore, Sebastian's average rate is 40 laps per hour.

6 0

3 years ago

What are the next three terms in the pattern 2, 6, 18, 54, ...?

castortr0y [4]

Answer:

OPTION B: 162, 486, 1458

Step-by-step explanation:

The given sequence is 2, 6, 18, 54, . . .

It is a geometric sequence and the common difference is 3.

The general form of a geometric sequence is: a, ar, ar², ar³, . . .

Here a = 2 and r = 3.

$n^{th}$ term of a Geometric progression is $ar^{n - 1}$ .

Note that the fourth term is 54.

i.e., $ar^3 = 54$

$\implies ar^4 = ar^3 . r = 54 . 3 = 162$ .

Similarly, $ar^6 = 162 \times 3 = 486$ .

Also, $ar^7 = ar^6 . r = 486 \times 3 = 1458$ .

Hence, OPTION B is the answer.

8 0

3 years ago

Read 2 more answers

Help asapppppp <br> Rewrite the formula

Allushta [10]

Answer:

${ \tt{A = \frac{1}{2} bh}} \\ \\ { \tt{bh = 2A}} \\ \\ { \boxed{ \tt{h = \frac{2A}{b} }}}$

• A is 18 in²

• b is 9 in

${ \tt{h = \frac{2 \times 18}{9} }} \\ \\ { \tt{h = \frac{36}{9} }} \\ \\ { \boxed{ \tt{h = 4 \: \: in}}}$

4 0

3 years ago

Read 2 more answers

What is the range of the relation of centimeters as a function of inches? {5.08, 10.16, 17.78, 25.4, 33.02} all positive integer

mel-nik [20]

Answer:

y>0 Option D

Step-by-step explanation:

4 0

3 years ago