1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
muminat
3 years ago
12

Please help if you know, thanks!

Mathematics
1 answer:
jonny [76]3 years ago
3 0
The number of 8th grade students have dropped by 25% this year
You might be interested in
When evaluating (6.28x10^12)/(3.14x10^4) what will be the exponent of 10 in the quotient?
alexdok [17]
2*10^8
the exponent would be 8
hope this helps!
4 0
3 years ago
Read 2 more answers
Cards are drawn, one at a time, from a standard deck; each card is replaced before the next one is drawn. Let X be the number of
steposvetlana [31]

Cards are drawn, one at a time, from a standard deck; each card is replaced before the next one is drawn. Let X be the number of draws necessary to get an ace. Find E(X) is given in the following way

Step-by-step explanation:

  • From a standard deck of cards, one card is drawn. What is the probability that the card is black and a jack? P(Black and Jack)  P(Black) = 26/52 or ½ , P(Jack) is 4/52 or 1/13 so P(Black and Jack) = ½ * 1/13 = 1/26
  • A standard deck of cards is shuffled and one card is drawn. Find the probability that the card is a queen or an ace.

P(Q or A) = P(Q) = 4/52 or 1/13 + P(A) = 4/52 or 1/13 = 1/13 + 1/13 = 2/13

  • WITHOUT REPLACEMENT: If you draw two cards from the deck without replacement, what is the  probability that they will both be aces?

P(AA) = (4/52)(3/51) = 1/221.

  • WITHOUT REPLACEMENT: What is the probability that the second card will be an ace if the first card is a  king?

P(A|K) = 4/51 since there are four aces in the deck but only 51 cards left after the king has been  removed.

  • WITH REPLACEMENT: Find the probability of drawing three queens in a row, with replacement. We pick  a card, write down what it is, then put it back in the deck and draw again. To find the P(QQQ), we find the

probability of drawing the first queen which is 4/52.

  • The probability of drawing the second queen is also  4/52 and the third is 4/52.
  • We multiply these three individual probabilities together to get P(QQQ) =
  • P(Q)P(Q)P(Q) = (4/52)(4/52)(4/52) = .00004 which is very small but not impossible.
  • Probability of getting a royal flush = P(10 and Jack and Queen and King and Ace of the same suit)
5 0
2 years ago
Leah practices dance for 2 hours each week. Her younger sister Sonia practices dance for 0.8 the amount of time Leah practices.
galben [10]
Sonia practices for 96 mins (1 hour 36mins ) 0.8 = 80%
3 0
2 years ago
Read 2 more answers
5x^2-44x+130=-30+16x
sweet [91]

Answer:

if its answer for x its

Step-by-step explanation:

=4

=8

7 0
2 years ago
Read 2 more answers
A bottle of fruit juice holds 1.89L. If Shakira bought almost 6L of fruit juice, how many bottles did she buy
ser-zykov [4K]
6 divided by 1.89= 3.17 so you can say she bought 3 bottles of fruit juice 
8 0
2 years ago
Other questions:
  • If 1/p+q=r and p≠-q, what is p in terms of r and q?
    11·1 answer
  • A bicycle manufacturing company makes a particular type of bike. Each child bike requires 4 hours to build and 4 hours to test.
    13·1 answer
  • Evaluate 5x2–3(x–2)+x for x=3
    8·2 answers
  • Which point is the vertex of the quadratic function f(x) = x^2-6+8?
    10·1 answer
  • My sandbox is a square each side is 6 feet long what is the area of the sandbox
    12·1 answer
  • For g(x)=x^2-2, determine g(x+2)
    15·1 answer
  • Which of the following correctly simplifies the expression 3 to the power of 2 multiplied by 5 to the power of 0 whole over 4, t
    10·1 answer
  • Help with this pls and thank u
    10·1 answer
  • Lorenzo reads at a rate of 45 words per minute. If he reads at a constant rate, how many words can he read in 6 minutes?
    5·2 answers
  • .104 into a fraction<br>.75 into a fraction​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!