B. 18.37
1990 - 1960 = 30 = t
Plug in the variable "t" to the equation and solve.
P (t) = 18.37
ANSWER
D.

EXPLANATION
The standard equation of the hyperbola is

We multiply through by 36 to obtain:

We now expand to get,

Expand :

To get the general form, we equate everything to zero to get,

The correct choice is D.
The probability of getting a 2 or a getting a black card, find individual probabilities;
A standard deck has 52 cards.
There are 4 2's in a normal deck; probability of getting it is 4/25
The probability of getting a black card is; 26/52 since half the deck is red and black.
Now add up the probabilities since it says "or"
(4/52)+(26/52)=30/52 probability of the card that you were dealt being a two or a black card.
Hope I helped :)
Answer:
1/12
Step-by-step explanation:
The probability of landing heads is 1/2, the probability of rolling a 3 is 1/6. Multiply them to get the answer.
Hope this helped!
_________X=30____
_________-________