Please help I am adding a picture it'll help so much. :)
2 answers:
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Answer:
1) For 450 minutes of calling the two plans cost the same.
2) The cost when the two plans cost the same is $56.5.
Step-by-step explanation:
The cost of both plans can be modeled by linear functions.
Plan A:
$25 plus an additional $0.07 for each minute of calls.
So, for t minutes of calls, the cost is:
Plan B:
$16 plus an additional $0.09 for each minute of calls.
So, for t minutes of calls, the cost is:
Q1: For what amount of calling do the two plans cost the same?
This is t for which:
For 450 minutes of calling the two plans cost the same.
Q2: What is the cost when the two plans cost the same?
This is A(450) or B(450), since they are the same.
The cost when the two plans cost the same is $56.5.
At the considered rate the fraction of pool that is filled per hour is 13/12
<h3>How to measure the rate of change of something as some other value changes?</h3>Suppose that we have to measure the rate of change of y as x changes, then we have:
where we have
Remember that, we divide by the change in independent variable so that we get some idea of how much the dependent quantity changes as we change the independent quantity by 1 unit.
(5 change per 3 unit can be rewritten as 5/3 change per 1 unit)
For the considered case, we can take time spent as difference of independent variable, and the amount of pools filled as the corresponding difference of the dependent variable.
in 12 hour time interval total 13 pools were filled.
That means
Rate of filling the pool is 13 pools per 12 hours or pools per hour.
Thus, at the considered rate the fraction of pool that is filled per hour is 13/12
Learn more about rate of change here:
Answer:
see below
Step-by-step explanation:
1) see attached image
2) <u> bearings from A to B</u>
Note: bearing is always clockwise from A and from North.
(i)
bearing 180° + 67°
247° from N
(ii)
bearing 148 + 180
328° from N
(iii)
bearing 180 - 21
159° from N
(iv)
39° from N
(v)
bearing 90 - 40
50° from N
3) <u>back bearing from each diagram on no. 2</u>
<u />
Note: subtract 200 if bearing is more than 180
add 180 if the bearing is less than 180
(i) 247 - 200 = 47°
(ii) 328 - 200 = 128°
(iii) 159 + 180 = 339°
(iv) 39 + 180 = 219°
(v) 50 + 180 = 230°
