krystalhurst97
23.06.2020 •
Mathematics
The perimeter of the given triangle is
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Ответ:
~73.68
Step-by-step explanation:
In the right triangle with one angle = 45 deg
=> Isosceles right triangle
=> a = b = hypotenuse/sqrt(2) = (12sqrt(2))/sqrt(2) = 12
In other right triangle with 3 sides are a, c, and d, we have:
sin (30 deg) = a/d
=> d = a/sin(30 deg) = 12/(1/2) = 12 x 2 = 24
Othwise, cosine (30 deg) = c/d
=> c = d x cos(30 deg) = 24 x sqrt(3)/2 = 12sqrt(3)
=> The perimeter of the biggest triangle is calculated by:
P = 12sqrt(2) + b + c + d = 12sqrt(2) + 12 + 12sqrt(3) + 24 = ~73.68
Hope this helps!
Ответ:
0.43.
Step-by-step explanation:
The probability that the customer will pay with debit card = 50%
The percentage of customers who use coupons 30% and 35% pay with debit card.
Now calculate the probability that the same person will use coupon:
P[Uses coupons | Pays with Debit card] = P[Uses coupons and pays with debit card] / P[ Pays with debit card]
= 0.3 * 0.5 / 0.35
= 3/7 or 0.4286 or 42.86%