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1. a circular track surrounds a lake and has a radius of 3 miles. durin…

Question

  1. a circular track surrounds a lake and has a radius of 3 miles. during a charity event, tanya walks from one side of the lake to the opposite side. how far does she walk?
  2. mr. quinones is covering a rectangular dinner table with clear acrylic. the table measures 7 feet long and 36 inches wide. if the polish acrylic cost $16 per square foot, what is the total cost to cover the table?
  3. a circular jogging loop in a city park has a radius of 5 km. marcos runs around the loop four complete laps during his morning workout. if in average, he burns 5 calories per km. what are the total calories that he burns in the workout?
  4. a warehouse floor measures 150 feet in length and 80 feet in width. the manager wants to get the permit from the fire department, and they charge for the inspection $75 plus $0.02 per square foot. what will be the total payment for the fire department?
  5. erick is designing a circular logo to be printed on a t - shirt. the logo has a diameter of 8 inches and will be printed on a square sheet of paper with an area of 64 square inches. how many square inches of the paper will remain unused?

Explanation:

1.

Step1: Encontrar el diámetro

El diámetro \(d\) de un círculo se calcula como \(d = 2r\), donde \(r\) es el radio. Dado que \(r=3\) millas.
\(d = 2\times3\)

Step2: Calcular la distancia

\(d = 6\) millas

Step1: Convertir la unidad de ancho

Dado que 1 pie = 12 pulgadas, entonces 36 pulgadas \(=\frac{36}{12}=3\) pies.

Step2: Calcular el área del rectángulo

El área \(A\) de un rectángulo es \(A = l\times w\), donde \(l = 7\) pies y \(w = 3\) pies. \(A=7\times3 = 21\) pies cuadrados.

Step3: Calcular el costo total

El costo por pie cuadrado es de \(16\) dólares. Entonces el costo total \(C=16\times21\)
\(C = 336\) dólares

Step1: Calcular la circunferencia del círculo

La circunferencia \(C\) de un círculo es \(C = 2\pi r\), donde \(r = 5\) km. \(C=2\times\pi\times5=10\pi\) km.

Step2: Calcular la distancia total recorrida

Marcos corre 4 vueltas. Entonces la distancia total \(D=4\times C=4\times10\pi = 40\pi\approx40\times 3.14 = 125.6\) km.

Step3: Calcular las calorías quemadas

Borra 5 calorías por km. Entonces las calorías totales \(E=5\times D\)
\(E=5\times125.6 = 628\) calorías

Answer:

6 millas

2.