<em><u>That isn't true</u></em>
<em><u>9+10=19</u></em>
<em><u>Good Lucks</u></em>
It is the bottom one...................................................
Answer:
The current is 5 mph
Step-by-step explanation:
The current helps the boat going down stream and hinders going up so it adds to the speed downstream and subtracts going up.
speed downstream is 20miles/40minutes =1 mi per 2 min. Or 30 mph
Speed upstream is
20 miles/ 60 minutes = 1 mile per 3minutes or 20 mph
So if the speed of the boat is the same (s) then downstream the boat travels
S+c =30 mph and s-c =20mph upstream if c is tge current speed
So s=30-c and s=20+c
So. 30-C=20+c
10=2C
5=C
The current is 5 mph
Answer:
18π + 90
Step-by-step explanation:
The perimeter is the sum of quarter of the circumference and 2r , that is
P = 2πr + (45 + 45)
= 2 × π × 36 ×
+ 90
= 2 × π × 9 + 90
= 18π + 90
Answer:
C. 0.0067
Step-by-step explanation:
6.7*10^-3
Write in standard form.
This question pertains to scientific notation, a way to easily express really large or really small numbers.
You'll first notice that 10 has a negative exponent. This tells you that the number is going to be smaller than 10.
This is because 10^-3 translates to 1/10^3 based on exponent rules
With that, you know that your equation is 6.7/10^3
<u>You can simplify that to:</u>
![\frac{6.7}{10^{3} }](https://tex.z-dn.net/?f=%5Cfrac%7B6.7%7D%7B10%5E%7B3%7D%20%7D)
![\frac{6.7}{1000}](https://tex.z-dn.net/?f=%5Cfrac%7B6.7%7D%7B1000%7D)
0.0067
In case you didn't know how I got there, 10^3 simply means 10 multiplied by itself 3 times.
The other method would be to look at your answer choices. Since we have a negative exponent, we can eliminate D.
Next, since we have a positive coefficient (6.7), we can eliminate A and B.
That leaves us with the answer C. 0.0067