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Ket [755]
3 years ago
7

I WILL GIVE BRAINLIEST IF YOU EXPLAIN YOUR ANSWER!!

Mathematics
2 answers:
LiRa [457]3 years ago
5 0

Answer:

380.13

Step-by-step explanation:

pi r^2

pi*11^2

pi*121

3.1415926*121

Sav [38]3 years ago
4 0

Answer:

379.94 sq. ft.

Step-by-step explanation:

HOPE THIS HELPS

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A physiological psychologist has performed an experiment to determine if a particular drug, smartozine, affects maze learning in
Elis [28]

Answer:

The critical value of F for this situation is 2.975.

Step-by-step explanation:

A test is being performed to determine if a particular drug, smartozine, affects maze learning in rats.

The groups are divided as follows:

  • Three groups of 8 rats each are injected with one of three different doses of smartozine.
  • The fourth group of 6 rats is injected with a saline solution as a control.

So, there were in total <em>k</em> = 4 groups with <em>n</em> = 30 rats.

The significance level of the test is, <em>α</em> = 0.05.

Compute the critical value of <em>F</em> as follows:

F_{\alpha, (k-1, n-k)}=F_{0.05, (4-1, 30-4)}=F_{0.05, (3,26)}=2.975

*Use the <em>F</em>-table.

Thus, the critical value of F for this situation is 2.975.

5 0
3 years ago
Here are the golf scores of 12 members of a college women's golf team in two rounds of tournament play. (A golf score is the num
Nuetrik [128]
Mean = (89 + 90 + 87 + 95 + 86 + 81 + 102 + 105 + 83 + 88 + 91 + 79)/12 = 1,076/12 = 89.67

a.) 95% C.I. = 89.67 + or - 1.96(0.23) = 89.67 + or - 0.4508 = 89.22 to 90.12

b.) 99% C. I = 89.67 + or - 2.575(0.23) = 89.67 + or - 0.5923 = 89.08 to 90.26
8 0
3 years ago
The total resistance R of two resistors connected in parallel circuit is given by 1/R = 1/R_1 + 1/R_2. Approximate the change in
Naily [24]

Answer:

a) Approximate the change in R is 0.5 ohm.

b) The actual change in R is 0.04 ohm.

Step-by-step explanation:

Given : The total resistance R of two resistors connected in parallel circuit is given by \frac{1}{R}=\frac{1}{R_1}+\frac{1}{R_2}

To find :

a) Approximate the change in R ?

b) Compute the actual change.

Solution :

a) Approximate the change in R

R_1=12\ ohm and R_2=10\ ohm

R_1 is decreased from 12 ohms to 11 ohms.

i.e. \triangle R_1=21-11=1\ ohm

R_2 is increased from 10 ohms to 11 ohms.

i.e. \triangle R_2=11-10=1\ ohm

The change in R is given by,

\frac{1}{\triangle R}=\frac{1}{\triangle R_1}+\frac{1}{\triangle R_2}

\frac{1}{\triangle R}=\frac{\triangle R_2+\triangle R_1}{(\triangle R_1)(\triangle R_2)}

\triangle R=\frac{(\triangle R_1)(\triangle R_2)}{\triangle R_2+\triangle R_1}

\triangle R=\frac{(1)(1)}{1+1}

\triangle R=\frac{1}{2}

\triangle R=0.5\ ohm

b) The actual change in Resistance

\frac{1}{R}=\frac{1}{R_1}+\frac{1}{R_2}

\frac{1}{R}=\frac{1}{12}+\frac{1}{10}

R=\frac{10\times 12}{10+12}

R=\frac{120}{22}

R=5.46\ ohm

When resistances are charged, R_1=R_2=11

\frac{1}{R'}=\frac{1}{R_1}+\frac{1}{R_2}

\frac{1}{R'}=\frac{1}{11}+\frac{1}{11}

R'=\frac{11}{2}

R'=5.5\ ohm

Change in resistance is given by,

C=R'-R

C=5.5-5.46

C=0.04\ ohm

3 0
3 years ago
A car is traveling at a speed of 44 feet per second. what is the car's speed in miles per hour? how many miles will the car trav
Sladkaya [172]
44 feet. 3600 seconds. 1 mile
----------- ---------------------- -----------
1 second 1 hour. 5280 feet

I wrote it this way so the units cancel out. You are multiplying the fractions by each other

The car is going 30 mph, and will go 120 miles in 4 hours.
4 0
3 years ago
Read 2 more answers
PLEASE HELP !!!!!!!!!!
umka21 [38]

Answer:

3 quarters

7 dimes and a nickel

7 dimes and 5 pennies

15 nickles

75 pennies

2 quarters 2 dimes and a nickel

etc.

Step-by-step explanation:


4 0
3 years ago
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