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anzhelika [568]
3 years ago
12

Perform the indicated operations. Write the answer in standard form, a+bi. (5-4i)(7-3i) =

Mathematics
2 answers:
Marrrta [24]3 years ago
8 0

Step-by-step explanation:

thank \: you

Elis [28]3 years ago
6 0

\\ \sf\longmapsto (5-4i)(7-3i)

\\ \sf\longmapsto 5(7-3i)-4i(7-3i)

\\ \sf\longmapsto 35-15i-28i+12i^2

\\ \sf\longmapsto 35-43i-12

\\ \sf\longmapsto 23-43i

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The radius of a cylindrical water tank is 5.5ft, and its height is 13ft. What is the volume of the tank?
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Answer:

The volume of the tank is 1235ft³

Step-by-step explanation:

To calculate the volume of a cylinder we have to use the following formula:

v = volume

h = height = 13ft

π = 3.14

r = radius = 5.5ft

v = (π * r²) * h

we replace the unknowns with the values we know

v = (3.14 * (5.5ft)²) * 13ft

v = (3.14 * 30.25ft²) * 13ft

v = 94.985ft² * 13ft

v = 1234.805ft³

Round to the nearest whole number

v = 1234.805ft³ = v = 1235ft³

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Step-by-step explanation:

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Answer:

120 millimeters or 0.12 liters

Step-by-step explanation:

To solve this question :

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  3. subtract the answer gotten from the step above from 2 litters

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