Answer:
4 secs
Step-by-step explanation:
Since they have to be synchronized, their parabolic equations must be equal to one another
3(t^2 + 9 - 6t) - (t^2 + 25 - 10t) - t + 2 = 0
2t^2 - 9t + 4
(2t - 1)(t - 4) = 0
t = 1/2, 4
From the options, the answer is 4
Answer:
The answers A
Step-by-step explanation:
Use ratios such that x1/y1= x2/y2
Need to find x2
So it works much easier if you use x as the numerator, giving 15/12=x/21
Multiply both sides by 21 and we have 21 x 15/12=x x 21/21
and 21/21=1 giving: x=21 x 15/12= 26 1/4
and in decimal form is 26.25
The answer is B, because if you draw the baseboards on the scale drawing, you'll get nineteen baseboards. 19 x 4,19 = 79,61
Answer:
4 quarters + 3 dimes + 2 nickels + 2 pennies = 11 coins total
We are interested in finding out how much of the collection is dimes only --> 3 dimes / 11 total = 3/11.
Hope This Helps! Have A Nice Day!!
Answer:
As 
, it is possible to reject null hypotesis. It means that the local mean height is less tha 0.7 m with a 5% level of significance.
Step-by-step explanation:
1. Relevant data:
2. Hypotesis testing
3. Find the rejection area
From the one tail standard normal chart, whe have Z-value for 
is 1.56
Then rejection area is left 1.56 in normal curve.
4. Find the test statistic:
5. Hypotesis Testing
As , it is possible to reject null hypotesis. It means that the local mean height is less tha 0.7 m with a 5% level of significance.
