Answer:
False
Step-by-step explanation:
given that a race car driver tested his car for time from 0 to 60 mph, and in 20 tests obtained an average of 4.85 seconds with a standard deviation of 1.47 seconds.
Sample size n = 20
since population standard deviation is not known, we can use t critical value for finding out the confidence interval
df=19
t critical = 2.045
Margin of error =
conidence interval = Mean±Margin of error
=
The given confidence interval is (4.52, 5.18)
Hence the statement is false.
Answer:
they sold 210 hot chocolates and 85 coffees
Step-by-step explanation:
We know that they sold $200 worth of drinks
x will be the number of hot chocolates sold
y will be the number of coffees sold
This means that
.75x+.5y=200
We also know that they sold 295 total drinks which means that
x+y=295
This is a system of linear equations which I will solve through substitution
x+y=295
Subtract y from both sides and divide by -1 to get
-x+295=y
Plug y into the first equation and get
.75x+.5(-x+295)=200
Distribute the .5 and simplify to get
.75x-.5x+147.5
.25x+147.5=200
Subtract 147.5 and then divide by .25 to get our x value
x=210
Now we can go back and plug this in into our equation
210+y=295
Subtract 210 to get y
y=85
This means that they sold 210 hot chocolates and 85 coffees
The arithmetic sequences are options A, C, and E.
<h3>What is an arithmetic sequence?</h3>
An arithmetic sequence is a succession of numbers that differ by a constant quantity called the difference of the progression. According to the above, it can be inferred that the arithmetic sequences are:
- A. 9, 6, 3, 0 ... in this sequence the difference is -3.
- C. 50, 52, 54, 56 ..., in this progression the difference is 2.
- E. 7, 21, 35, 59 ..., in this progression the difference is 14.
According to the above, options A, C and E are progressions because they have constant differences in the sequences, which makes it possible to identify the numbers that follow in the sequence.
Learn more about arithmetic in: brainly.com/question/2171130
A line parallel to y = 0.6x + 3 will be of the form:
where k is a constant.
It passes through (-3,-5)
Thus,
Answer:
1. c Volume
2. d cubic units
3. b surface area
4. c 2(18*7) 2(17*7) 2(18*7)
5. not sure sorry