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Cerrena [4.2K]
3 years ago
14

An adult blinks about 450 times in 30 minutes. A 12 year old blinks about 150 times in 15 minutes. How many more times does an a

dult blink in 60 minutes that a 12-year-old?
Mathematics
1 answer:
kaheart [24]3 years ago
5 0

Answer:

300

Step-by-step explanation:

An adult blinks

450 in 30 minutes

900 in 60 minutes (multiply 2 on both sidds)

A 12-year-old blinks

150 times in 15 minutes

600 times in 60 minutes (multiply 4 on both sides)

Difference:

900 - 600 = 300.

An adult blinks 300 more times.

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Answer:

Step-by-step explanation:

I need  the answer for same question pleas

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3 years ago
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Can someone help me the 2nd problem I don’t understand it
Galina-37 [17]

Answer:

So this means the bus B covered 390-120=270 miles when bus A has already reached 390 miles.

270 miles

Step-by-step explanation:

So is A is going faster than B so A will reach the destination first.

When will A reach it's destination?

Let's find out.

To solve this problem, the following will come in handy:

Speed=distance/time or time*Speed=distance or time=distance/speed .

time=distance/speed

T_A=\frac{390}{S_A}

T_A=\frac{390}{65}

T_A=6

So it will take bus A 6 hours to cover the distance of 390 miles.

How much time would have it taken bus B to reach that same distance?

T_B=\frac{390}{45}

T_B=8.\overline{6}

So it would have taken bus B 8.\overline{6} hours to cover a distance of 390 miles.

So the time difference is 8.\overline{6}-6=2.\overline{6} hours.

It will take 2.\overline{6} more hours than bus A for bus B to complete a distance of 390 miles.

So bus B traveled 2.\overline{6} \cdot 45=120 miles (used the time*speed=distance) after bus A got to it's destination.

So this means the bus B covered 390-120=270 miles when bus A has already reached 390 miles.

4 0
3 years ago
Use limits to find the area of the region bounded by the graph f(x)=4-2x^3 , the x-axis , and the vertical lines x=0 and x=1
gtnhenbr [62]

Answer:

\frac{7}{2} square units.

Step-by-step explanation:

We have to use limits to find the area of the region bounded by the graph f(x) = 4 - 2x^{3} , the x-axis, and the vertical lines x=0 and x=1.

So, the area will be

A = \int\limits^1_0 {(4 - 2x^{3})} \, dx

= [4x - \frac{x^{4}}{2} ]^{1} _{0}

= 4 - \frac{1}{2}

= \frac{7}{2} square units. (Answer)

3 0
3 years ago
(x+2)(x+5) find the following products by using distributive property
nika2105 [10]

Answer:

To multiply these two terms you multiply each individual term in the left parenthesis by each individual term in the right parenthesis.

(

x

+

5

)

(

x

+

2

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becomes:

(

x

×

x

)

+

(

x

×

2

)

+

(

5

×

x

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+

(

5

×

2

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x

2

+

2

x

+

5

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10

We can now combine like terms:

x

2

+

(

2

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x

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10

x

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Step-by-step explanation:

7 0
3 years ago
PLEASE HELP MATH TEST SOON
Sav [38]

Answer:

The answer is A.16

Step-by-step explanation:

2.5/0.4= 6.25

100/6.25= 16

6 0
3 years ago
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