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
professor190 [17]
3 years ago
9

Does a heart have one line of symmetry

Mathematics
2 answers:
Murljashka [212]3 years ago
4 0
No it has multiple lines
Olegator [25]3 years ago
4 0
Yes. The line of symmetry is down the center
You might be interested in
John had 2/3 of his homework done sarah had 5/10 alex 7/8 and michelle 1/2 who complete most of the homework
Greeley [361]
It would be Alex. John finished 66.6 percent of his homework, Sarah completed 50 percent, and Michelle completed 50 percent of her homework. While Alex has completed 87.5 percent of his homework.
7 0
2 years ago
Read 2 more answers
The diameter of steel rods manufactured on two different extrusion machines is being investigated. Two random samples of sizes
devlian [24]

Answer:

(a) There is no evidence to support the claim that the two machines produce rods with different mean diameters.

P-value is 0.818

(b) 95% confidence interval for the difference in mean rod diameter is (-0.17, 0.27).

This interval shows that the difference in mean is between -0.17 and 0.27.

Step-by-step explanation:

(a) Null hypothesis: The two machines produce rods with the same mean diameter.

Alternate hypothesis: The two machines produce rods with different mean diameter.

Machine 1

mean = 8.73

variance = 0.35

n1 = 15

Machine 2

mean = 8.68

variance = 0.4

n2 = 17

pooled variance = [(15-1)0.35 + (17-1)0.4] ÷ (15+17-2) = 11.3 ÷ 30 = 0.38

Test statistic (t) = (8.73 - 8.68) ÷ sqrt[0.38(1/15 + 1/17)] = 0.05 ÷ 0.218 = 0.23

degree of freedom = n1+n2-2 = 15+17-2 = 30

Significance level = 0.05 = 5%

Critical values corresponding to 30 degrees of freedom and 5% significance level are -2.042 and 2.042.

Conclusion:

Fail to reject the null hypothesis because the test statistic 0.23 falls within the region bounded by the critical values -2.042 and 2.042.

There is no evidence to support the claim that the two machines produce rods with different mean diameters.

Cumulative area of test statistic is 0.5910

The test is a two-tailed test.

P-value = 2(1 - 0.5910) = 2×0.409 = 0.818

(b) Difference in mean = 8.73 - 8.68 = 0.05

pooled sd = sqrt(pooled variance) = sqrt(0.38) = 0.62

Critical value (t) = 2.042

E = t×pooled sd/√n1+n2 = 2.042×0.62/√15+17 = 0.22

Lower limit of difference in mean = 0.05 - 0.22 = -0.17

Upper limit of difference in mean = 0.05 + 0.22 = 0.27

95% confidence interval for the difference in mean rod diameter is between a lower limit of -0.17 and an upper limit of 0.27.

3 0
3 years ago
If a hiker starts at sea level and increases her elevation at a rate of 1 foot per minute what will her elevation be in 20 minut
sattari [20]

Answer:

20 feet above sea level.

Explanation:

This can be solved by looking at the Rate of Change. It is given that for ONE minute that passes by, her elevation increases by ONE foot.

With this rate, after 20 minutes, the elevation can be shown as:

20 min × 1 foot= 20 feet.

4 0
2 years ago
Read 2 more answers
There are 970 students in bayton high school. Brian takes a random sample of 100 students. He asks these 100 students which subj
Pani-rosa [81]

Answer:

How to do the estimation

Step-by-step explanation:

He can use the probability of how many people chose English and multiply by 9.7 since there are 970 people / 100 people who asked = 9.7

7 0
3 years ago
Kailey baked 36 muffins for the bake sale. if 2/3 of the muffins were blueberry, how many actual muffins were NOT blueberry?
yarga [219]
36 * 2/3 = 24 were blueberry.

36 - 24 = 12 were not blueberry. 
4 0
3 years ago
Read 2 more answers
Other questions:
  • Can someone help me with this,'<br><br><br> PLEASE?!?!
    11·1 answer
  • Can someone help me solve this... Please!​
    15·1 answer
  • Miranda purchased two pairs of leggings for $2.99 each a bottle of nail polish for $3.49 and a lipstick for $5.99
    12·2 answers
  • George was building a staircase for his dog to get up on his bed. The first step is made from 2 boards, the second out of 4 boar
    8·1 answer
  • Find a . b if a = (4.3) and b = (4,5).<br><br> a. 31<br> b. (8,8)<br> c. (16,15)<br> d. -1
    10·2 answers
  • Five bulbs of which three are defective are to be tried in two bulb points in a dark room
    8·1 answer
  • Pleaseeee help im confused best answer will get brainliest.
    11·1 answer
  • Can someone help me with this please ?
    9·1 answer
  • What is an equation that equal 1/5
    6·1 answer
  • Can someone help (8grade math)
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!