A lot of plastic straws find their way into the oceans each year. Approximately 8.3x10^9 plastic straws will find their way into the oceans in a single year. If each straw weighs 9.3x10^-4 pounds, then how much plastic is entering the Earth’s oceans per year just in plastic straws? Show your conclusion. Express your answer in both scientific notation and in standard form.

i think the answer is seven, for if i'm being useless °ω°

step-by-step explanation:

30 feet

step-by-step explanation:

that would be 2 1/2 * 12

= 24 + 6

= 30 feet   (answer)

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.