40t = 60(t-1)
distribute the right side
40t = 60t-60
subtract 60t from each side
-20t =-60
divide both sides by -20
t = -60 / -20 = 3
3 hours
Answer:
No , we would not reject the null hypothesis at α = 0.05
Step-by-step explanation:
Given that a random survey of 100 students asked each student to select the most preferred form of recreational activity from five choices. Following are the results of the survey.
(Two tailed chi square test at 5% level for testing independence between gender and sports activities)
We assume H0 to be true and prepare expected values and then calculate chi square as (O-E)^2/E where O = observed value, E = expected value
Basketball Softball Swimming running Tennis
Males 21 (18.00) [0.50] 5 (4.80) [0.01] 9 (6.00) [1.50] 12 (16.20) [1.09] 13 (15.00) [0.27] 60
Females 9 (12.00) [0.75] 3 (3.20) [0.01] 1 (4.00) [2.25] 15 (10.80) [1.63] 12 (10.00) [0.40] 40
chisquare 8.4097
p value 0.077
df 4
Since p > 5% we accept null hypothesis.
No , we would not reject the null hypothesis at α = 0.05
Answer:
$22.40
Step-by-step explanation:
For this question you have to use decimal multipliers to work out the sale price of the cola given the information that in a grocery store, a $32 case of soda is labelled get a 30 % discount so to use decimal multipliers we have minus 100 by 30 and then divide by 100
→ We have to minus 100 by 30
⇒ 70
→ And then divide by 100
⇒ 70 ÷ 100 = 0.7
0.7 is the decimal multiplier for this question so we multiply it by the case of soda price with is $32 so
32 × 0.7 = 22.4
The sale price of the case of soda is $22.40 considering a 30% discount on a $32 case of soda
That's correct.
She will need to travel 244 miles a week for 9 weeks.
Answer:
First box : 2
Second box : 8
Third box : 4
Fourth box : 80
Fifth box : 240
Step-by-step explanation:
First, 9 - 7 = 2
Second, 2 x 2 x 2 = 8
Third, 8/2 = 4
Fourth, 320/4 = 80
Fifth, 80 x 3 = 240
Hope this helps!