2 An astronomer wrote the distances from Earth to two different stars in scientific
notation.
• Distance from Earth to star A = 4 X 1013
• Distance from Earth to star B = 8 x 1015
About how many times farther from Earth
is star B than star A?
A 2
100
10
D 200

you never say the total so we cant find the percentage used for petrol

step-by-step explanation:

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)

sure i'm up for it

step-by-step explanation:

answer:   expression= p+p*d%

price reduction + sale price = $625

sale price: $p+$p*d%

where d% is the percentage of discount

step-by-step explanation:

original price = p

price went down by $150 price reduction $p*d%

sale price= $ 475

therefore the price before sale is: $625

and the expression that shows the price before sale is: p+p*d%