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The lateral area of a right pyramid can be calculated by multiplying half of the perimeter of the base by the slant height. This is summarized by the formula: LA 5 Ps. We can relate this formula to the square pyramid below and its net. The side length of the base of the pyramid is b, and the slant height is s.
Answer:
$1.46
Step-by-step explanation:
Required cards for winning :
1's, 2's and 3's
There are 4 cards of each in a total of 52 cards ;
Therefore, number of winning cards ;
(4 * 3) = 12 cards
Hence,
P(winning) = 12 / 52 = 3 / 13
P(not winning) = 1 - 3 /13 = (13 - 3) / 13 = 10/13
Earning (X)
Amount earned for winning = $43
Amount lost for not winning = $11
X ___ $43 ______ - $11
P(X) _ 3/13 _______ 10/13
Expected value, E(X) = ΣX*P(X)
Σ(X) = (43 * 3/13) + (-11 * 10/13)
E(X) = 9.9230769 - 8.4615384
E(X) = 1.4615385
E(X) = $1.46
Answer: $11.67
Step-by-step explanation:
Sale Price = $3.50 , Rate = 70% or 0.7
Selling Price = Original Price - Discount
Discount = Rate x Original Price
Substitute the formula for Discount, we'll have
Selling Price = Original Price - (Rate x Original Price)
3.50 = Original Price - (0.7*Original Price)
Considering original price = 1,
3.50 = 1 Original Price - 0.7 Original Price
3.50 = 0.3 * Original Price Divide both sides of 0.3
3.50 / 0.3 = Original Price
Original Price = $11.67
Answer:
Step-by-step explanation:
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