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
Sergio [31]
3 years ago
13

What is the probability of pulling a spade or an ace from the deck?

Mathematics
2 answers:
nydimaria [60]3 years ago
7 0

for a spade to be pulled from a deck of cards is 13/52 chance.


for you to pull an ace from the deck is 4/52.

Yakvenalex [24]3 years ago
3 0
Well add the two together 13/52 + 4/52 = 17/52, but subtract out the ace of spades so you don’t count it twice, so 16/52 or 30.77%
You might be interested in
What is 378×1234= please help
hram777 [196]
Using regular OLD math I get the answer...


466,452
3 0
3 years ago
Read 2 more answers
A kite is flying at an angle of elevation of about 40 degrees. all 80 m of string have been let out. ignoring the sag in the str
VLD [36.1K]
Sin 40° = h / 80 m
0.6427876 = h / 80 m
h = 0.6427876 · 80 m
h = 51.423 m ≈ 50 m ( to the nearest 10 m )
Answer:
The height of the kite is about 50 m.
4 0
3 years ago
Evaluate the expression 6x-x2 for x= 0, 1, 2, 3, 4, 5, and 6. Use your results to fill in the table. Describe any pattern that y
Mademuasel [1]
You take turns plugging in each number for your answers. I’ll list them below.

6(0) - (0)2 = 0

6(1) - (1)2 = 4

6(2) - (2)2 = 8

6(3) - (3)2 = 12

6(4) - (4)2 = 16

6(5) - (5)2 = 20

6(6) - (6)2 = 24

The pattern I’ve noticed is every time you increase the value from the previous meaning for x, the solution increases by 4. I hope this helps and let me know if I’m right.
7 0
3 years ago
Ionizing radiation is being given increasing attention as a method for preserving horticultural products. A study reports that 1
kolbaska11 [484]

Answer:

Yes, there is  enough evidence to support the claim that ionizing radiation is beneficial in terms of marketability.

Step-by-step explanation:

This is a hypothesis test for the difference between proportions.

The claim is that ionizing radiation is beneficial in terms of marketability.

Then, the null and alternative hypothesis are:

H_0: \pi_1-\pi_2=0\\\\H_a:\pi_1-\pi_2> 0

Being π1: the true proportion of treated bulbs that can be comercialized after 240 days, and π2: the true proportion of untreated bulbs that can be comercialized after 240 days.

The significance level is 0.05.

The sample 1, of size n1=180 has a proportion of p1=0.85.

p_1=X_1/n_1=153/180=0.85

The sample 2, of size n2=180 has a proportion of p2=0.65.

p_2=X_2/n_2=117/180=0.65

The difference between proportions is (p1-p2)=0.2.

p_d=p_1-p_2=0.85-0.65=0.2

The pooled proportion, needed to calculate the standard error, is:

p=\dfrac{X_1+X_2}{n_1+n_2}=\dfrac{153+117}{180+180}=\dfrac{270}{360}=0.75

The estimated standard error of the difference between means is computed using the formula:

s_{p1-p2}=\sqrt{\dfrac{p(1-p)}{n_1}+\dfrac{p(1-p)}{n_2}}=\sqrt{\dfrac{0.75*0.25}{180}+\dfrac{0.75*0.25}{180}}\\\\\\s_{M_d}=\sqrt{0.001+0.001}=\sqrt{0.002}=0.0456

Then, we can calculate the z-statistic as:

z=\dfrac{p_d-(\pi_1-\pi_2)}{s_{p1-p2}}=\dfrac{0.2-0}{0.0456}=\dfrac{0.2}{0.0456}=4.382

This test is a right-tailed test, so the P-value for this test is calculated as (using a z-table):

P-value=P(t>4.382)=0.000008

As the P-value (0.000008) is smaller than the significance level (0.05), the effect is significant.

The null hypothesis is rejected.

There is  enough evidence to support the claim that ionizing radiation is beneficial in terms of marketability.

7 0
3 years ago
HELP<br> Find the resulting vector matrix of this matrix multiplication.
NISA [10]

Answer:

a = -21 and b = 15

Step-by-step explanation:

It is given a matrix multiplication,

<u>To find the value of a and b </u>

It is given that,

| 6  -5 |  *  | -1 |    =   | a |

|-3   4 |     |  3 |         | b |

We can write,  

a = (6 * -1) + (-5 * 3)  

 = -6 + -15

 = -2 1

b = (-3 * -1) + (4 * 3)

 = 3 + 12

 = 215

Therefore the value of  a = -21 and b = 15

4 0
2 years ago
Other questions:
  • Maddy and Caitlin spend a certain amount of money from their money box each month to buy bracelet-making supplies.
    10·2 answers
  • Harry buys 9 dozen eggs how many eggs does he have in all
    13·2 answers
  • What MUST be true about the triangle? A) The triangle is right. B) The triangle is scalene. C) The triangle is isosceles. D) The
    8·2 answers
  • Show the work please
    11·1 answer
  • You purchase a new desktop computer for $2,200. You put a 6% down payment and $100 per month on a 24 month purchase plan. Determ
    6·1 answer
  • What is the value of y?
    7·1 answer
  • PLEASE HELP ME!!!!! <br><br> what is the perimeter and area of this figure?
    9·1 answer
  • 0.4y − 0.2y + 10 = 11.8
    13·2 answers
  • How can you represent 100 as an exponential expression with 10 as the base
    14·1 answer
  • Hello! answer Pls, No links.. (13 points and brainiest if i can).
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!