Answer:
The probability that the person uses exactly one of the facilities is 69.23%.
Step-by-step explanation:
Since there are 130 people in a sport center, of which 65 people use the gym, 51 people use the swimming pool, 44 people use the track, 15 people use the gym and the pool, 14 people use the pool and the track. , 10 people use the gym and the track and 1 person uses all three facilities, to determine, if a person is selected at random, what is the probability that the person uses exactly one of the facilities, the following calculation must be performed:
130 = 100
130 - 1 - 15 - 14 - 10 = X
130 = 100
90 = X
90 x 100/130 = X
9,000 / 130 = X
69.23 = X
Therefore, if a person is selected at random, the probability that the person uses exactly one of the facilities is 69.23%.
Answer:
1) The student didn't add copper sulfate but instead he added calcium carbonate.
2) The heated solution should be left to get bigger crystals and should not be instantly allowed to evaporate.
3) He should use copper carbonate not calcium carbonate.
4) Sulfuric acid was added instead of hydrochloric acid.
5) Add solid excessively so that all of the acid is retained.
6) Filter the solution to remove unreacted solid.
7) Heat gently, so the crystals will start to appear.
Answer: C.
Step-by-step explanation: I used m.athway
Answer:
Solution given:
length[l]=3x^2-9x+4
breadth [b]=6x-5
we have
perimeter of rectangle=2[l+b]=2[3x^2-9x+4+6x-5]
=6x²-6x-2 is your answer
If you move a decimal to the right it gets bigger
If you move a decimal to the left is gets smaller
So if you had 0.864 and moved the decimal two places to the right it becomes 86.4
If you had 4.678 and moved the decimal two places to the left is becomes 0.04678
Hope this helps
<em>Hugs ~L</em>
