Answer:65
Step-by-step explanation:
I'm not sure what you mean by "expression form," but if its simpliest form, you would simply do 20+5*9, and 5*9 is 45. 45+20 is 65
Answer:
2000.8 m or 2km height
(π 0.07^2)×2000 = 30.78 m^3.
Step-by-step explanation:
The total surface area of a cylinder of radius 7 cm is 880 m^2. Find the height and the volume of the cylinder.
"A cylinder is flat" according to curvature theory (unlike a sphere, where triangle angles can add to more than 180°). So unwrap it and compute area as circumference times height, or height as area divided by circumference. 880m^2 / (2 π 0.07 m) gives height = 2000.8 m or 2km (!!)
The volume of a cylinder is cross section area times height. (π 0.07^2)×2000m = 30.78 m^3.
(1,0),(6,-3)
slope(m) = (-3 - 0) / (6 - 1) = -3/5
y - y1 = m(x - x1)
slope(m) = -3/5
(6,-3)....x1 = 6 and y1 = -3
now sub....and pay attention to ur signs
y - (-3) = -3/5(x - 6)......this is not the final answer....but it seems to be what ur question is asking for.
Answer:
139
Step-by-step explanation:
Substract 41 from 180 assuming line LN is a straight line. the angles are supplementary
Answer:
(17.736 ; 21.139)
Step-by-step explanation:
Given the data:
22 14 25 15 19 15 17 21 15 16 23 16 29 21 22 21
Confidence interval ; (C. I) :
Mean ± Zcritical * σ/sqrt(n)
The mean value for the data:
Mean = Σx / n
n = 16
Σx = 311
Mean = 311 / 16 = 19.4375
Zcritical at 90% = 1.645
σ = sqrt[Σ(x - mean)² / n]
Using calculator :
σ = 4.138
19.4375 ± 1.645 * 4.138/sqrt(16)
19.4375 ± 1.645 * 4.138/4
19.4376 ± 1.7017525
Lower bound = 19.4376 - 1.7017525 = 17.736
Upper bound = 19.4376 + 1.7017525 = 21.139
