Find the circumference and the area of a circle with diameter 6yd . Use the value 3.14 for π , and do not round your answers.

Mathematics

2 answers:

wel2 years ago

7 0

It would be 18.85yd.

Makovka662 [10]2 years ago

4 0

18.84 should be the correct answer

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What is the value of the expression below when z = 2? 4z2 – 3z – 4

zhenek [66]

Answer:

Step-by-step explanation:

$4z^2 - 3z - 4\\z =2$

Substitute 2 for z in the given equation

$4(2)^2 - 3(2) -4\\$

Follow the PEMDAS order of operations

$\mathrm{Calculate\:exponents}\:\left(2\right)^2\::\quad 4\\=4\cdot \:4-3\left(2\right)-4\\\\\mathrm{Multiply\:and\:divide\:\left(left\:to\:right\right)}\:4\times\:4\::\quad 16\\=16-3\left(2\right)-4\\\\\mathrm{Multiply\:and\:divide\:\left(left\:to\:right\right)}\:3\left(2\right)\::\quad 6\\=16-6-4\\\\\mathrm{Add\:and\:subtract\:\left(left\:to\:right\right)}\:16-6-4\::\quad 6$