Find the volume of the pyramid

Mathematics

1 answer:

qaws [65]3 years ago

6 0

Answer:

494 cubic meteres

Step-by-step explanation:

formula: lwh/3

(12 x 13 x 9 1/2) divided by 3= 4 x 13 x 19/2 = 52 x 19/2 = 26 x 19 = 494cubic metres

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The temperature of a cup of coffee varies according to Newton's Law of Cooling: dT dt equals negative k times the quantity T min

Maslowich

Answer:

67.3°C

Step-by-step explanation:

A = 25, T(0) = 100, T(1) = 90, find T(4)

dT/dt = -k(T - A)

d(T - A)/dt = -k(T - A)

d(T - A)/(T - A) = -k dt

ln(T - A) = lnC - kt

$T(t) -A=Ce^{-kt}\\T(t) = A + Ce^{-kt} = 25 + Ce^{-kt}\\T(0) = 25 + C = 100\\C=75$

$T(t) = 25 + 75e^{-kt}\\T(1) = 25 + 75e^{-k} = 90\\75e^{-k} = 65\\e^{-k} = \frac{65}{75}, k = ln\frac{75}{65} = 0.1431\\T(t) = 25+75e^{-0.1431t}\\T(4) = 25+75e^{-0.1431\times4} = 67.3$

4 0

2 years ago

HELPPPPPPPPPPPPPPPP

IRINA_888 [86]

Answer:\Another way to solve a system of equations is by substitution. With this method, you are essentially simplifying one equation and incorporating it into the other, which allows you to eliminate one of the unknown variables. Consider the following system of linear equations:

Step-by-step explanation:

hope this helps!

8 0

2 years ago

Read 2 more answers

Pattern:

Radda [10]

Answer:

Sue is correct

Step-by-step explanation:

because of the simple fact that the numbers are increasing and not decreasing so why would they do 8n-6

8 0