Taniya Burns
2022-07-27
Answered

A coffee house has 20 pounds of a coffee that sells for $4 perpound. How many pounds of coffee that sells for $8 a pound shouldbe mixed with 20 pounds of the $ 4 per pound cofee to obtain ablend that will sell for $5 per pound? How much of the $5 per poundcoffee will there be?

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asked 2020-10-18

Find a least squares solution of Ax=b by constructing and solving the normal equations.

$A=\left[\begin{array}{cc}3& 1\\ 1& 1\\ 1& 4\end{array}\right],b\left[\begin{array}{c}1\\ 1\\ 1\end{array}\right]$

$\stackrel{\u2015}{x}=$ ?

asked 2021-05-13

A movie stuntman (mass 80.0kg) stands on a window ledge 5.0 mabove the floor. Grabbing a rope attached to a chandelier, heswings down to grapple with the movie's villian (mass 70.0 kg), whois standing directly under the chandelier.(assume that thestuntman's center of mass moves downward 5.0 m. He releasesthe rope just as he reaches the villian).

a) with what speed do the entwined foes start to slide acrossthe floor?

b) if the coefficient of kinetic friction of their bodies withthe floor is 0.250, how far do they slide?

asked 2022-08-03

Recent studies indicate that the average surface temperature of theearth has been rising steadily. Some scientists have modeled thetemperature by the linear function T = 0.02t + 8.25, where T is temperature in Cand t represents years since 1900. Use the equation topredict the average global surface temperature in 2060.

asked 2022-07-20

At sea level, air pressure is 30 inches of mercury. At an altitude of h feet above the sea level, the air Pressure, P, in inches of mercury, is given by the function

$P=30{e}^{-0.0000323h}$

Determine the rate of change of the air pressure, in inches of mercury per feet, for a pilot of a small plane passing through an altitude of 1300 feet. Round your answer to five decimal places.

$P=30{e}^{-0.0000323h}$

Determine the rate of change of the air pressure, in inches of mercury per feet, for a pilot of a small plane passing through an altitude of 1300 feet. Round your answer to five decimal places.

asked 2022-09-02

Use the appropriate form of the percentage formula. 50 % of 30 is what number?

asked 2021-09-24

Determine whether the given problem is an equation or an expression. If it is an equation, then solve. If it is an expression, then simplify. y/3 + (y - 5)/10 = (4y + 3)/5

asked 2022-09-10

Sixty ounces of a 50% gold alloy are mixed with 40 oz of a 40% gold alloy. Find the percent concentration of the resulting gold alloy.\