Answer:
(x,y)= ( 5 over 273, - 265 over 273)
Step-by-step explanation:
Let the speed of plane in still air be x and that wind be y
therefore:
x+y=490
x-y=390
next we solve for the values of x and y, first we add the above equations. This will give us:
2x=880
x=880/2
x=440 miles per hour.
substituting the value of x in one of the equations and solving for y we get:
440+y=490
y=490-440
y=50 miles per hour
Answer:
3.52 × 10⁸
Step-by-step explanation:
Scientific notation is written in: <em>Number that is in the ones place × 10^power</em>.
Here, the number is <em>3.52</em>, since 3 has the largest placement.
The power on the 10 should be the number of 0's on 352,000,000/3.52. That is <em>100,000,000</em>. That number has <em>8 0's, so the power is to the 8th</em>.
Putting that together, this number in scientific notation in 3.52 × 10⁸.
