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IceJOKER [234]
3 years ago
9

Help me please please

Mathematics
1 answer:
Rama09 [41]3 years ago
3 0

Answer:

12

Step-by-step explanation:

\frac{1}{3}×12+8

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A person breathes 2.5 x 10^-4 in about cubic meters of air per second. How long does it take to breathe in 2.5 cubic meters of a
Ipatiy [6.2K]

Answer:

10⁴ seconds

Step-by-step explanation:

Given that,

A person breathes 2.5\times 10^{-4} in about cubic meters of air per second.

We need to find time taken to breathe 2.5 cubic meters of air.

In 1 sec = 2.5\times 10^{-4} m³ of air breathe

Let in x seconds, 2.5 m³ of air taken by the person.

x=\dfrac{2.5}{2.5\times 10^{-4}}\\\\x=10^4\ s

Hence, in 10⁴ seconds 2.5 m³ of air is taken by the person.

5 0
3 years ago
For males in a certain town, the systolic blood pressure is normally distributed with a mean of 120 and a standard deviation of
KengaRu [80]

Answer:

G=93\ to\ 147

Step-by-step explanation:

From the question we are told that

Mean x= 120  

Standard deviation \sigma= 9

Percentage for men =99.75%

Generally the empirical rule 68%,95% and 99.7% of data value lay b/w 1,2,3 standard deviation of mean  

Standard deviation n= 9

Mean x= 120

Generally the interval  of systolic blood pressure for middle 99.7 of male G is mathematically given as

G=Mean \pm 3* \sigma

G=120 \pm 3*9

G=93\ to\ 147

6 0
2 years ago
55 percent of 48 is the same as 60 percent of what number? I WILL AWARD BRAINLEIST
mars1129 [50]

Answer:

Step-by-step explanation:

55% of 48 = 26.4

0%-------------------------------------60%------------100%

0                                             26.4

60x1.6~=100

26.4x1.6~=44

...55% of 48 is the same as 60% of 44

5 0
3 years ago
Mrs. Mobley can jog 3 miles in 27 minutes. How many miles can she jog in 81 minutes?
zalisa [80]

Answer:

9 miles

Step-by-step explanation:

You need to get 27 minutes to 81 minutes so you multiply 27 by 3, and that is 81, so you simply multiply 3 by 3 and get 9! Hope this helps! ;)

(27 x 3) = 81

(3 x3) = 9

3 0
3 years ago
You randomly survey 40 students about whether they play an instrument. You find that 8 males play an instrument and 13 females d
VashaNatasha [74]

Answer:

Step-by-step explanation:

7 0
3 years ago
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