Check all the following expressions that are written in correct scientific notation. A 1.2 * 55 B 32.4 * 106 C 5.2 * 10-7 D 3.24 + 105 E .98 7 * 104 F 8.345601 * 104

step-by-step explanation:

i need to answer questions so i dont know but i think its the first one because it goes up but a consent rate

the answer is c hope it

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sorry man i accidentally pressed yes my bad

step-by-step explanation:

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet