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3 years ago

A runner ran 3000 m in exactly 8 minutes. What was his average speed in meters per second?

1 answer:

7 0

8 minutes has 8*60 or 480 seconds. If we divide 3000 meters by 480 seconds, we get an average speed of 6.25 m/s.

Answer is D.

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In ΔTUV, v = 240 inches, t = 390 inches and ∠U=71°. Find the area of ΔTUV, to the nearest square inch.

meriva

Answer:

44250

Step-by-step explanation:

delta math

7 0

3 years ago

Average sales for an online textbook distributor were $67.63 per customer per purchase. Assume the sales are normally distribute

Fynjy0 [20]

Answer:

(a)P(x>85.55)=0.02275

(b) $P(x$

Step-by-step explanation:

We are given that

Average sales for an online textbook distributor per customer per purchase

, $\mu=$ $67.63

Standard deviation of the amount spent on textbooks, $\sigma=$ $8.96

(a) We have to find probability for a randomly selected customer spent more than $85.55 per purchase.

$P(x>85.55)=P(\frac{x-\mu}{\sigma}>\frac{85.55-67.63}{8.96})$

= $P(Z>2)$

= $1-P(Z\leq 2)$

= $1-0.97725$

P(x>85.55)=0.02275

(b)We have to find probability for a randomly selected customer spent less than $76.59 per purchase

$P(x$

$P(x$

6 0

3 years ago

Yi's average for her first 3 tests is 88. what musit she score on her last test to bring her average up to 90

timofeeve [1]

Her average now is 88.
She needs to bring it up to a 90.

Let's start with if she gets a 90.
88 + 90 = 178
178/2 = 89
A 90 would only get her an average of 89, so you need to go higher.

88 + 91 = 179
179/2 = 89.5

88 + 92 = 180
180/2 = 90

She must get at least a 92 to get an average of 90.

6 0

4 years ago

Can anyone help me with this

Evgesh-ka [11]

Answer:

3,520 is what i got

Step-by-step explanation:

LWH=V

4 0

3 years ago

Help Please?! ?????????????

andrezito [222]

Answer:

Ed's answer of $\frac{3}{8}$ is correct because he divided $\frac{1}{4}$ by $\frac{2}{3}$ to get his answer.

Step-by-step explanation:

To solve for m in $\frac{2}{3}m=\frac{1}{4}$ you want to isolate m by dividing by $\frac{2}{3}$ on both sides, therefore he divided $\frac{1}{4}$ by $\frac{2}{3}$ to get his answer of $\frac{3}{8}$ , and his answer is correct.

5 0

3 years ago