Un agricultor necesita un vallas este terreno, de 64,16 hectómetros de perímetro, pero quiere dejar abierto uno de los lados puntos y el perímetro de vallas es de 13 € cada metro, ¿cuanto le costará?

Step-by-step explanation:

A farmer needs a fence on this land, with a perimeter of 64.16 hectometres, but he wants to leave one of the points open and the fence perimeter is € 13 per meter, how much will it cost him?

1 hectometre = 100 metres

64.16 hectometres = x

Cross Multiply

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:

it would open into a square depending on the type of envelope i’m not sure about the second part