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2 years ago

6

laura picks 7 apples. some apples are red and some are green. fewer than 4 of the apples are red. how many of lauras apples coul

d be green? explain how you know?

2 answers:

Schach [20]2 years ago

8 0

4 or more apples could be green because if there are 3 or less red then there must be 4-7 green

Vikentia [17]2 years ago

6 0

Answer:

4, 5, 6 or 7.

Step-by-step explanation:

Given,

Total number of apples = 7,

Let x be the number of red apples,

Then the number of green apples = 7 - x,

According to the question,

x < 4

-x > -4

7-x > 7 - 4

7-x > 3

⇒ Number of green apples > 3,

Also, number of green apples ≤ 7

Thus, the number of green apples are more than 3 i.e. 4, 5, 6 or 7.

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cupoosta [38]

A stuntman jumping off a 20-m-high building is modeled by the equation h = 20 – 5t2, where t is the time in seconds. A high-speed camera is ready to film him between 15 m and 10 m above the ground. For which interval of time should the camera film him?

Answer:

$1\leq t\geq \sqrt{2}$

Step-by-step explanation:

Given:

A stuntman jumping off a 20-m-high building is modeled by the equation

$h =20-5t^{2}$ -----------(1)

A high-speed camera is ready to making film between 15 m and 10 m above the ground

when the stuntman is 15m above the ground.

height $h = 15m$

Put height value in equation 1

$15 =20-5t^{2}$

$5t^{2} =20-15$

$5t^{2} =5$

$t^{2} =1$

$t =\pm1$

We know that the time is always positive, therefore $t=1$

when the stuntman is 10m above the ground.

height $h = 10m$

Put height value in equation 1

$10 =20-5t^{2}$

$5t^{2} =20-10$

$5t^{2} =10$

$t^{2} =\frac{10}{5}$

$t^{2} =2$

$t=\pm\sqrt{2}$

$t=\sqrt{2}$

Therefore ,time interval of camera film him is $1\leq t\geq \sqrt{2}$

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2 years ago

The probability that a radish seed will germinate is 0.7. a gardener plants seeds in batches of 11. find the standard deviation

den301095 [7]

To calculate for the standard deviation given the probability, we use the formula:

s = sqrt (n p q)

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2 years ago

George took a nonstop flight from Dallas to

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It is given in the question that,

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So we have,

$460* \frac{75}{60} + 439*x = 1233$

$575 + 439x =1233
\\
439x = 1233 - 575
\\
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And to convert it in minutes, we have to multiply by 60. And on doing so, we will get

$x = \frac{658}{439}*60 =approx \ 90 \ minutes$

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den301095 [7]

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