Renewable energy. In 2016, U.S. consumption of renewable energy was 9.97 quadrillion Btu (or 9.97 × 10 15 Btu). Since the 1950s, consumption has been growing at a rate (in quadrillion Btu per year) given by f ′ ( t ) = 0.002 t + 0.03 where t is years after 1950. Find f (t) and estimate U.S. consumption of renewable energy in 2030 . ( Source: Energy Information Administration)
Renewable energy. In 2016, U.S. consumption of renewable energy was 9.97 quadrillion Btu (or 9.97 × 10 15 Btu). Since the 1950s, consumption has been growing at a rate (in quadrillion Btu per year) given by f ′ ( t ) = 0.002 t + 0.03 where t is years after 1950. Find f (t) and estimate U.S. consumption of renewable energy in 2030 . ( Source: Energy Information Administration)
Solution Summary: The author explains the function f(t) and estimate U.S. consumption of renewable energy in 2030.
Renewable energy. In 2016, U.S. consumption of renewable energy was 9.97 quadrillion Btu (or 9.97 × 1015 Btu). Since the 1950s, consumption has been growing at a rate (in quadrillion Btu per year) given by
f
′
(
t
)
=
0.002
t
+
0.03
where t is years after 1950. Find f(t) and estimate U.S. consumption of renewable energy in 2030. (Source: Energy Information Administration)
3. (i) Let A, B, C, D, E be positive constants. Find the limit
n³ D
lim A(BC)³ +1 en 4+E.
n→∞
[6 Marks]
(ii) Let X be a random variable with the standard normal distribution,
i.e. X has the probability density function
Let
1
f(x)
√2π
n3x2
Xn = 100(50 +X6) en³4, n = 1, 2,...,
3+1
(a) Find the limit lim∞ Xn, verify your answer.
Y = 100(50 +X) 22.
[6 Marks]
(b) Is Xn≤Y? Verify your answer.
[6 Marks]
(c) Is EY∞o? Verify your answer.
[6 Marks]
(d) Does lim∞ EXn
(e) Find lim∞ EXn.
Elim Xn? Why?
[6 Marks]
[3 Marks]
Set up a free RStudio account at posit.cloud. At the start of your R session, you should enter the following commands.
set.seed(1)
e<-rnorm(n = 100,mean = 0,sd = 80)
x<-seq(1,100,1)
y<-10+15*x + e
Follow the examples in the Panopto Videos to use R to obtain the values requested below. (As always, if you round your answers, make sure you do so correctly and keep at least
three decimal places.)
(a) The smallest value of y =
(b) The largest value of y =
(c) The standard deviation of y =
(d) The mean of y =
(e) The median of y =
(f) The correlation between x and y =
:
(g) Using the variable e as data, the p-value for a test of Hoμ = 0 vs. HA μ0 is
3. (i) Using the definition of the line integral of a vector field, calculate the
line integral
L³
F.dy
of the vector field F: R² → R² given by
F(x, y) = (y, x),
and where the curve & is the unit semi-circle centred at the origin, located in
the upper half-plane and oriented in the anticlockwise direction.
Hint. Represent the curve y as the join of two curves y = 71 + 1/2 (see Example 8.9
in the Notes).
[20 Marks]
(ii) Calculate the same integral using Green's Theorem.
[10 Marks]
Chapter 5 Solutions
Calculus for Business, Economics, Life Sciences, and Social Sciences - Boston U.
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