Astronomers measure large distance in light years one light year is the distance that light can travel in one year, or approximately 5,880,000,000,000 miles suppose a star is 13.4 light years from earth in scientific notation how many miles away is it

Step-by-step explanation:

To calculate the distance between the star that is 13.4 light years away from the earth, you just have to multiply 13.4 by 5,880,000,000,000, which is how many miles there are in a light year.

So you´d get:

To convert this into scientific notation, you just have to count how many numbers are there after the first numeric value, in this case how many numbers are there after the first seven.

There are 13 numbers after the first seven now you just add a decimal point after the seven and add a , the X is the number of numeric values after the decimal point, since in this case there are 13 numeric values after the decimal point we added, we just add the 13 instead of the X:

And the number in scientific notation would be:

ghjmutmum

step-by-step explanation:

step-by-step explanation: so we look at the formula un = a + (n-1)d

un is the amount of seats

n is the nth term aka row number

a is the original sequence/row number

d is the difference between each term

so in this a=22 d=6 and n can remain as n because we are simply formjng a rule

lets put these in the equation

un=22+(n-1)(6)

this is your answer to part a

however

lets double check that this is correct, we'll try putting it into the second term

un=a+(n-1)d

u2=22+(2-1)(6)

u2=22+6

u2=28

as the question said the second row has 28 seats so now we know the formula we made is correct.

as for part b

un=a+(n-1)

its asking us to find a row with 100 seats.

remember un was the amount of seata so all we do is substitute this in.

un=100 a=22 d=6

un=a+(n-1)d

100=22+(n-1)(6)

so now we simplify to find n which is the row number.

100-22=22+(n-1)(6)-22

78=(n-1)(6)

78/6=(n-1)(6)/6

13=n-1

13+1=n-1+1

14=n

so now we know that in the 14th row there is 100 seats.

hope this and that you understood! its my first time using the app or anyone out on here : p its also me to revise so a bunch! ask more questions if you dont understand ☺