Answer:
Approximately 
.
Step-by-step explanation:
The cards were drawn with replacement. Therefore, the probability of drawing a red card will be 
at every one of the seven draws. The probability of not drawing a red card would be 
.
One way to get three red cards out of the seven draws would be 
. That corresponds to a probability of 
.
However, there are many other ways to get three red cards during the seven draws. For example:
There are 
such ways in total to choose three draws out of seven draws.
These ways are mutually-exclusive. Each of these ways has a probability of . The probability for getting a red card on exactly three out of the seven draws would be:
.
Sounds simple to me but may be misleading, I can't see a trick.
I think all you do is multiply each by 30.
So answer is 45ft X 37.5ft
Hope it's correct. I'd appreciate if you could let me know. Thks..
Answer:
Step-by-step explanation:
<u>Area formula:</u>
<u>The height is:</u>
- h = (x + 2)sin 45° = √2(x + 2)/2
<u>Substitute the area value an set an equation:</u>
- 4√2 = (2x - 3)√2(x + 2)/2
- (2x - 3)(x + 2) = 8
- 2x² + x - 6 = 8
- 2x² + x - 14 = 0
- D = 1 + 4*2*14 = 113
- x = (-1 + √113)/4 = 2.41 (rounded)
Note. the second root ignored as negative
The fifth or sixth I'm not sure
Answer
Assuming that the
mass of the smallest humming bird is = 4 g
Mass of the larger humming bird = 5 times mass of Bee hummingbird.
Mass of larger humming bird = 5 x 4 g
= 20 g
Hence, mass of the larger humming bird is equal to 20g.
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