Given that the die-cast plane is scaled at 1 inch to 1 foot. This means that for each foot of the actual plane, the toy is 1 inch.
Therefore, the dimensions of the actual plane is given by 1 x 6.5 inches wide by 1 x 8.5 inches long = 6.5 inches wide by 8.5 inches long.
Answer:
(8.213 ; 8.247)
Step-by-step explanation:
Given the data :
No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Dia. 8.23 8.16 8.23 8.25 8.26 8.23 8.20 8.26 8.19 8.23 8.20 8.28 8.24 8.25 8.24
Sanple size, n = 15
Sample mean, xbar = Σx / n = 123.45 / 15 = 8.23
The sample standard deviation, s = √(x -xbar)²/n-1
Using calculator :
Sample standard deviation, s = 0.03116
s = 0.031 (3 decimal places)
The 95% confidence interval :
C.I = xbar ± (Tcritical * s/√n)
Tcritical at 95%, df = 15 - 1 = 14
Tcritical = 2.145
C.I = 8.23 ± (2.145 * 0.031/√15)
C.I = 8.23 ± 0.0171689
C.I = (8.213 ; 8.247)
Answer: D
Step-by-step explanation:
(g*h)(x) is equal to g(x) times h(x). So, simply multiply them to get
Answer:
She should buy 7 large pieces of fabric to make 7 scarves
Step-by-step explanation:
Length of side of each square piece =
Area of 1 square piece =
Doris uses 8 square pieces to make one scarf.
Area of 8 square pieces = Area of 1 scarf =
Area of 7 scarves =
Length of fabric bought by Doris =
Breadth of fabric brought by Doris = 2 yards
Area of fabric brought by Doris =
So,She should buy no. of large pieces of fabric to make 7 scarves =
Hence She should buy 7 large pieces of fabric to make 7 scarves
Answer: 96
Step-by-step explanation: take 12 (1 dozen) and times it by 8
12x8=96