15 Im sure its 15 I re calculated just to be sure
Answer:
120 ft^2
Step-by-step explanation:
if we cut it in the middle, we get two parallelogram
area of parallelogram = base * height
= 12 * 5 =60 ft^2 for one parallelogram
60 * 2 =120 ft^2 for two parallelogram, that's is the total area of the figure
Mario = 3g
Jasmine = 10 more shells than Mario = 3g + 10
Hence, number of shells they collected together
= Mario + Jasmine = 3g + 3g + 10 = 6g + 10
Answer: the t-test statistic is - 1.77
Step-by-step explanation:
For the null hypothesis,
H 0: μ = 2600
For the alternative hypothesis,
H a: μ ≠ 2600
This is a two tailed test
Since no population standard deviation is given, the distribution is a student's t.
Since n = 50,
Degrees of freedom, df = n - 1 = 50 - 1 = 49
t = (x - µ)/(s/√n)
Where
x = sample mean = $2450
µ = population mean = $2600
s = samples standard deviation = $600
Therefore,
t = (2450 - 2600)/(600/√50) = - 1.77
