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3 years ago

Please help 100 points

Mathematics

2 answers:

Leno4ka [110]3 years ago

8 0

B is it is 20 times

denpristay [2]3 years ago

8 0

^Oh/umanhear=25x10^-6 meters =25um
Let x = 1x10^-5 y=2x10-4 x/y=10^-5/2.10^-4=0.5x10^-1. X=0.05y
10000nm
3x10^-7 meter

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A typical person has an average heart rate of 70.0 70.0 beats/min. Calculate the given questions. How many beats does she have i

harina [27]

Answer:

a) 2.2 × 10⁸ beats

b) 2.20 × 10⁸ beats

c) 2.207 × 10⁸ beats

Step-by-step explanation:

Data provided in the question:

Average heart rate of a typical person = 70.0 beats/min

Now,

In the given cases, the significance is on the significant figures after the decimal

Therefore,

the answer is will be provided accordingly

Now,

a) Time = 6.0 years

[since 1 significant figure after decimal. answer will be give in 1 significant figure after decimal ]

time in minutes = 6.0 × 365 × 24 × 60

= 3.1 × 10⁶ minutes

Total beats = Average heart rate × Time

= 70 × 3.1 × 10⁶

= 2.2 × 10⁸ beats

b) Time = 6.00 years

[since 2 significant figure after decimal. answer will be give in 2 significant figure after decimal ]

time in minutes = 6.00 × 365 × 24 × 60

= 3.15 × 10⁶ minutes

Total beats = Average heart rate × Time

= 70 × 3.15 × 10⁶

= 2.20 × 10⁸ beats

c) Time = 6.000 years

[since 3 significant figure after decimal. answer will be give in 3 significant figure after decimal ]

time in minutes = 6.000 × 365 × 24 × 60

= 3.154 × 10⁶ minutes

Total beats = Average heart rate × Time

= 70 × 3.154 × 10⁶

= 2.207 × 10⁸ beats

8 0

3 years ago

Answer to this ?????????

marin [14]

9= h/9

Mutiply both sides by 9

9*9= h/9*9

Cross out 9 and 9 , divide by 9 and then becomes h

9*9= 81

Answer: h= 81

3 0

3 years ago

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31% of what number is 25?

melamori03 [73]

Uhh, I think it is 80.65

Hope this helped （￣︶￣）↗　

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3 years ago

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Jean drove 64 miles per hour for a total of 448 miles on a trip. She used the equation below to calculate the time, t, it would

Alexandra [31]

Answer:

Step-by-step explanation:

since there is no given formula I'm guessing that's what we want to find?

use the dist. = rate * time formula for this kind of problem

or d = r*t ( this looks like the word "dirt" to me so I call this the dirt formula partly b/c it's dirt simple, and it's generally about moving across some give dist. of dirt :P )

so Jean's rate is 64 MPH

her total distance is 448 miles

rearrange the d = rt formula so that you are solving for the thing you don't know.. yet.... t (time) for this case

soooo...

d/r = t

plug in number

448 / 64 = t

7 = t (in hours)

7 0

2 years ago

Henri has $24,000 invested in stocks and bonds. The amount in stocks is $6,000 more than three times the amount in bonds. How mu

kotykmax [81]

Answer:

The amount of investment in bonds is US$ 4,500 and the amount of investment in stocks is US$ 19,500

Step-by-step explanation:

Total investment in stocks and bonds = US$ 24,000

Amount of investment in bonds = x

Amount of investment in stocks = 3x + 6,000 (amount in stocks is $6,000 more than three times the amount in bonds)

For finding the value of x (amount of investment in bonds), we use this equation:

x + 3x + 6,000 = 24,000

x + 3x = 24,000 - 6,000

4x = 18,000

x = 4,500 (dividing by 4)

The amount of investment in bonds is US$ 4,500

Now let's find the amount of investment in stocks:

3x + 6,000 = 3 (4,500) + 6,000 = 13,500 + 6,000 = 19,500

The amount of investment in stocks is US$ 19,500

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3 years ago

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