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
ZanzabumX [31]
2 years ago
8

Sally bought two shirts that cost $6.99 each. The sales tax rate was 7%. What was the total amount Sally paid?Question 3 options

:$0.98$7.48$14.05$14.96
Mathematics
1 answer:
Nuetrik [128]2 years ago
4 0

Answer: $14.96

Step-by-step explanation:

13.98 + .98 = 14.96

You might be interested in
Suppose that an automobile manufacturer designed a radically new lightweight engine and wants to recommend the grade of gasoline
yawa3891 [41]

Answer:

B) 4.07

Step-by-step explanation:

First we need to calculate the mean of all the data, which is the same as the mean of the means of each grade of gasoline:

Regular    BelowRegular   Premium   SuperPremium

39.31             36.69                38.99             40.04

39.87            40.00                40.02             39.89

39.87            41.01                  39.99             39.93

X1⁻=39.68    X2⁻= 39.23       X3⁻= 39.66    X4⁻=  39.95

Xgrand⁻ = (39.68+39.23+39.66+39.95)/4 = 39.63

Next we need to calculate the sum of squares within the group (SSW) and the sum of squares between the groups (SSB), and the respective degrees of freedom):

SSW = [ (39.31-39.68)² + (39.87-39.68)² + (39.87-39.68)² ] + [ (36.69-39.23)² + (40.00-39.23)² + (41.01-39.23)² ] + [ (38.99-39.66)² + (40.02-39.66)² + (39.99-39.66)² ] + [ (40.04-39.95)² + (39.89-39.95)² + (39.93-39.95)² ] = [0.2091] + [10.2129] + [0.6874] + [0.0121] = 11.12

SSW =  11.12

Degrees of freedom in this case is calculated by m(n-1), with m being the number of grades of gasoline (4) and n being the number of trial results for each one (3), so we would have 4(3-1) = 8 degrees of freedom

SSB = [ (39.68-39.63)² + (39.68-39.63)² + (39.68-39.63)²] + [ (39.23-39.63)² + (39.23-39.63)² + (39.23-39.63)² ] + [ (39.66-39.63)² + (39.66-39.63)² + (39.66-39.63)² ] + [ (39.95-39.63)² + (39.95-39.63)² +(39.95-39.63)² ] = [0.0075] + [0.48] + [0.0027] + [0.3072] = 0.7974

SSB =  0.80

For this case, the degrees of freedom are m-1, so we would have 4-1 = 3 degrees of freedom

Now we can establish the hypothesis for the test:

H0: μ1 = μ2 = μ3 = μ4

The null hypothesis states that the means of miles per gallon for each fuel are the same, indicating that the drade of gasoline does not make a difference, therefore our alternative hypothesis will be:

H1: the grade of gasoline does makes a difference

We will use the F statistic to test the hypothesis, which is calculated like follows:

F - statistic = (SSB/m-1) / (SSW/m(n-1)) = (0.80/3) / (11.12/8) = 0.19

We know that the level of significance we are using is α = 0.05, so to find the critical value F we need to look at some table of critical values for the F distribution for the 0.05 significance level (like the attached image). Then we just need to look fot the value that is located in the intersection between the degrees of freedom we have in the numerator (horizontal) and the denominator (vertical) of the statistic (3 and 8). That critical value is:

Fc = 4.07

3 0
3 years ago
A coffee shop uses two different-sized bins to store coffee beans. The volume of the smaller bin is
DedPeter [7]

Answer:

hey i was wondering if I can be made a the answer is the L 0ne

sorry if im wrong

3 0
2 years ago
How long will it take a vehicle to travel 480km at a speed of 75km/h?
Wittaler [7]
V = d/t
75 km/h = 480km /t
t = 480km / 75 km
t = 6.4 hours or 384 minutes
8 0
3 years ago
GEOMETRY HELP PLS! 50 POINTS!!
icang [17]

Answer:

the answer is c

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
What is the solution to the inequality below?
madam [21]

Answer:

C. x < 25 and x ≥ 0

Step-by-step explanation:

Fastest and easiest way to do this is to graph the inequality and find out the lines.

8 0
3 years ago
Other questions:
  • Which statement is true about the value of |6|?​
    13·1 answer
  • Kirsten and Molly are on a 3-day bike ride. The entire route is 156 miles. On the first day, they biked 64 miles. On the second
    10·2 answers
  • Write the number in two other form 600,000+80,000+10
    13·1 answer
  • What is the radius or diameter of r=11cm
    10·2 answers
  • 1
    10·1 answer
  • Suppose<br> f(x) = x3 + 3. Find the graph of<br> 2<br> f<br> 3<br> х
    5·2 answers
  • 100 POINTS 100 POINTS!
    6·2 answers
  • Answer 3. and 4. Please help me
    9·1 answer
  • Which angles are adjacent?
    10·1 answer
  • What is the perimeter of this composite figure?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!