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Montano1993 [528]
3 years ago
6

A scientist uses an electron microscope to look at tiny structures called stereocillia, which sits in top of hair cells. The dia

meter of one sterocillium is found to be approximately 2.5 meters. What is the diameter expressed in a scientific notion
Mathematics
1 answer:
goldenfox [79]3 years ago
6 0

Answer:

<h2>2.5*10^0</h2>

Step-by-step explanation:

To write a number in scientific notation or standard form we write the number and multiply it by 10 to the power of any number

  The proper format for scientific notation is a x 10^b  and it is read "a times 10 to the power of b"

Given the diameter of 2.5

in standard form or scientific notation is 2.5*10^0

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Ahmed lent amir Rs8000 at simple interest for 3 years at the rate of 5% per annum. How much more would he have gained if he had
lubasha [3.4K]

Ahmed could have gained 61 rupees more, if had given had given in compound interest.

<em><u>Solution:</u></em>

Given that Ahmed lent amir Rs8000 at simple interest for 3 years at the rate of 5% per annum

<em><u>Simple Interest calculation:</u></em>

Principal = 8000

Rate of interest = 5%

Time = 3

Formula:

S.I=\frac{p\times n\times r}{100}

Where , "p" is the principal and "n" is the number of years and "r" is the rate of interest

Substituting the values in formula,

S.I = \frac{8000 \times 3 \times 5}{100}\\\\S.I = 80 \times 3 \times 5 = 240 \times 5\\\\S.I = 1200

<em><u>Compound Interest calculation:</u></em>

Principal = 8000

Rate of interest = 5% compounded annually

Time = 3

Formula:

C.I=P(1+\frac{R}{100})^n-P

Substituting the values in formula,

\Rightarrow C.I=8000(1+\frac{5}{100})^3-8000\\\\\Rightarrow C.I=9261-8000\\\\\Rightarrow C.I=1261

Therefore, the difference between the interests:

1261 - 1200 = 61

Thus he could have gained 61 rupees more, if had given had given in compound interest.

7 0
3 years ago
The angle of elevation of an unfinished tower from a point of 120m away from its base is 25 degrees. How much higher will the to
Sav [38]

Answer:

44.73 m

Step-by-step explanation:

Given that the angle of elevation of an unfinished tower from a point of 120m away from its base is 25 degrees.

Using trigonometry ratio, the height of the tower can be calculated by

Tan Ø = height / base

Tan 25 = height / 120

Make height the subject of formula

Height = 120 × tan 25

Height = 55.96 m

How much higher will the tower need to be raised so that its angle of elevation from the same point will be 40 degrees?

Using the same formula to calculate the new height.

Tan 40 = new height / base

Tan 40 = new height / 120

Make the new height the subject of the formula.

New height = 120 × tan 40

New height = 100.69 m

Increase in height = new height - height

Increase in height = 100.69 - 55.96

Increase in height = 44.73m

Therefore, the tower will need 44.73m to be raised so that its angle of elevation from the same point will be 40 degrees.

4 0
3 years ago
A farmer is comparing the number of eggs laid by two hens. The first hen laid 7 eggs per week for x weeks. The second hen laid 8
nikitadnepr [17]

Answer:

7x ≥ 8y

Step-by-step explanation:

The first hen laid 7 eggs per week for x weeks.  7x

The second hen laid 8 eggs per week for y weeks. 8y

The total number of eggs laid by the first hen was at least the total number of eggs laid by the second hen.

7x ≥ 8y

7 0
3 years ago
Simplify the expression<br> (-1-3i)(-6-i)
Ivan
(-1-3i)(-6-i)
=6+i+18i+3i^2
=3i^2+19i+6. Hope it help!
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3 years ago
easy algebra question below first correct answer gets brainliest, if you put a link i will report and block
boyakko [2]

Answer:

6x²

Step-by-step explanation:

3x×2x=6...... then an x²

Therefore answer is 6x²

3 0
2 years ago
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