Can someone me with this.
i'm not good with graphs

∠BCD = 34°

Step-by-step explanation:

∠FCE + ∠FCA + ∠ACB = 180° ( straight angle ), thus

∠FCE + 90 + 56 = 180, that is

∠FCE + 146 = 180 ( subtract 146 from both sides )

∠FCE = 34°, hence

∠BCD = ∠FCE = 34° ( vertical angles )

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation: