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3 years ago

8

A kitten's heartbeat can be as fast as 240 beats per minute.to find the number of times a kitten's heart beats in 30 seconds, Ai

den says divide 240 by 30. Do you agree with him? Why or why not?

1 answer:

katovenus [111]3 years ago

8 0

No, because to half something you have to divide by 2 or multiply by .5

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David rolls a number cube fifty times. The number 4 comes up twelve times. The number 3 comes up eight times. What is the experi

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Answer:

40%.

Step-by-step explanation:

Prob( Rolling a 4) = 12/50

Prob( Rolling a 3) = 8/50

When the combined probabilities contain an 'OR' we Add the probability values:

Probability of a 3 or a 4

= 12/50 + 8/50

= 20/50

= 2/5

= 40%.

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If two angles of a triangle each measure 50 degrees, then what is the measure of the third angle of the triangle? Complete the s

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Answer: 80

Step-by-step explanation:

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$f(x,y)=x^2+y^3\implies \left.\cfrac{}{} 2x+3y^2 \right]_{\stackrel{\textit{\small x=2}}{\textit{\small y=1}}}\implies 2(2)+3(1)^2\implies 7$

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2 years ago

There are approximately 7.7 billion humans on Earth. If the virus spreads beyond the 200-person town, how long will it be until

eimsori [14]

Answer:

25.2 weeks until everyone on the planet is infected

Step-by-step explanation:

The number of infected people after t weeks has the following format:

$P(t) = P(0)(1+r)^{t}$

In which P(0) is the initial number of infected people and r is the growth rate, as a decimal.

The number of infected people doubles every week

This means that $P(1) = 2P(0)$

So

$P(t) = P(0)(1+r)^{t}$

$2P(0) = P(0)(1+r)$

$1 + r = 2$

$r = 1$

So

$P(t) = P(0)*(2)^{t}$

200-person town

This means that $P(0) = 200$

So

$P(t) = P(0)*(2)^{t}$

$P(t) = 200*(2)^{t}$

How long will it be until everyone on the planet is infected?

This is t for which P(t) = 7700000000[/tex]

So

$P(t) = 200*(2)^{t}$

$7700000000 = 200*(2)^{t}$

$2^{t} = \frac{7700000000}{200}$

$\log{2^{t}} = \log{\frac{7700000000}{200}}$

$t\log{2} = \log{\frac{7700000000}{200}}$

$t = \frac{\log{\frac{7700000000}{200}}}{\log{2}}$

$t = 25.2$

25.2 weeks until everyone on the planet is infected

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3 years ago

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Answer:

A) 400 B) 182 C)45.5%

Step-by-step explanation:

A) Is your total sales which is 400(shown in bottom right corner)

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C) You divided your pizza sales by your total sales - 182/400 = .455(Then multiply this by 100 to get the percent) (.455*100) = 45.5%

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