The answer is 1.25 hours.
STEP 1.
Each page has about 350 words: 1 page - 350 words
15 pages is x words: 15 pages - x words
1 : 350 = 15 : x
x = 15 * 350 : 1 = 5250
So, she has to type at least 5250 words.
STEP 2:
<span>Stephanie can type around 70 words per minute: 70 words - 1 minute
x words in 1 hour = 60 minute: x words - 60 minute
70 : 1 = x : 60
x = 70 * 60 : 1 = 4200
So, she types around 4200 words per hour.
STEP 3:
Now we have:
</span>- she has to type at least 5250 words
- she types around 4200 words per hour
5250 : x = 4200 : 1
x = 5250 * 1 : 4200 = 1.25 hours
Answer:
B
Step-by-step explanation:
This is a distance-rate-time problem, so we need to use the equation: 
, where d is the distance, r is the rate, and t is the time.
Here, we know that the total distance is 150, so d = 150. Also, we are given that Sergio's rate is 60 mph, so r = 60. Put these in:
d = rt
150 = 60t
To solve for t, we divide both sides by 60. Because we are dividing and not multiplying, we know that B is the only one that is incorrect.
Hope this helps!
Y = 5x + 4
Gradient = slope = 5
(0,4) = y - intercept
Answer:
(29-23)²/23 + (16-23)²/23 + (19-23)²/23 + (28-23)²/23
Step-by-step explanation:
Given :
n(American) = 29
n(Chinese) = 16
n(Mexican) = 19
n(Italian) = 28
Expected value = (29 + 16 + 19 + 28) / 4
Where, 4 = sample size
Expected value, E = 23
χ² = (Observed value - Expected value)² / expected value
χ² = (29-23)²/23 + (16-23)²/23 + (19-23)²/23 + (28-23)²/23
