If A⃗ =8.8 i^ -8.5 j^, B⃗ = -8.1 i^+7.2 j^+4.2k^ and C⃗ =6.8 i^ -9.2 j^. (1)Determine A⃗ ⋅(B⃗ +C⃗ ).
Express your answer using two significant figures.
(2) Determine (A⃗ +C⃗ )⋅B⃗ .
Express your answer using two significant figures
(3)Determine (B⃗ +A⃗ )⋅C⃗ .
Express your answer using two significant figures.
help

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

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find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2