The width of a virus is 2.0 x 10 to the(-7)th meter. Write this number in standard decimal notation
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It takes 3 years for the balance of account to be $ 221
<em><u>Solution:</u></em>
From given information,
Principal = $ 200
Rate of interest = 3.5 %
Amount after "n" years = $ 221
To find: number of years
In simple Interest,
Simple interest = amount earned - principal
Simple interest = 221 - 200 = 21
Thus simple interest earned is $ 21
<em><u>The formula for simple interest is given as:</u></em>
Where,
p is the principal
n is the number of years
r is the rate of interest per annum
Substituting the given values in formula,
Thus it takes 3 years for the balance of account to be $ 221
Answer:
<h3>The function formula for the number of pages left to read is given by P(t)=55(10-t).</h3>Step-by-step explanation:
Given that "Naoya read a book at a rate of 55 pages per hour".
After reading book for 4 hours, he had 330 pages remaining to read.
In 4 hours, Naoya must read is given by
( by given)
From the given there were 330 pages remaining to read at the time,
The total number of pages is given by
=220+330
=550
<h3>∴ The total number of pages is 550 </h3>For each hour of reading, Naoya reads 55 pages, so the number of pages he finished reading by the "t"th hour is given by 55t
Let P(t) be the number of pages to read where P is a function of time t (measured in hours)
So the number of pages left to read is given by
P(t)=550-55t
P(t)=55(10-t)
<h3>∴ the function formula for the number of pages left to read is given by P(t)=55(10-t).</h3>