Mathematics: Round to the nearest tenth (picture provided)

1100 + 0.075(43,000) = 1100 + 3225 = 4325 ==...

Round to the nearest tenth (picture provided)

MK100

05.01.2022

d. 6.3

Step-by-step explanation:

Given b=3,c=9 and $A=21\degree$ , we can use the cosine rule to find .

The cosine rule is given by;

$a^2=b^2+c^2-2bc\cos(A)$

We substitute the values to obtain;

$a^2=3^2+9^2-2(3)(9)\cos(21\degree)$

$a^2=9+81-54\cos(21\degree)$

a^2=90-50.4133

a^2=39.5867

$a=\sqrt{39.5867}$

a=6.2918

To the nearest tenth, a=6.3

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