Questions in mathematics

Questions in mathematics

[Done] A circle has an area of \(16\pi\) square meters. What is the circumference of the circle? Please show how to solve.

[Done] From the equations [tex]7a = 4[/tex] and [tex]7a + 4b = 12[/tex], one can conclude that [tex]b[/tex] is? Please explain the work behind the solution.

[Done] Shayla says that one kilometer is equal to one million millimeters. Is she correct? Explain why.

[Done] The square of a certain negative number is equal to 5 more than one half of the number. What is the number?

[Done] If the circumference of a baseball is 24 cm, what is the volume of the object?

[Done] A meter stick casts a shadow 1.4 m long at the same time a flagpole casts a shadow 7.7 m long. The triangle formed by the meter stick and its shadow is similar to the triangle formed by the flagpole and its shadow. How tall is the flagpole?

[Done] The radius of a bicycle wheel is 12 inches. What is the approximate circumference of the wheel?

[Done] The numbers 9, 40, and c are a Pythagorean triple. What is the value of c? A. 41 B. 43 C. 45 D. 49

[Done] Round 0.8127 to 3 decimal places.

[Done] Rewrite the expression by using grouping symbols: \( y \cdot 4 + y \cdot z \) A. \( y \cdot (4 + y) \cdot z \) B. \( y \cdot (4 + z) \) C. \( 4 \cdot (y + z) \) D. \( z \cdot (y \cdot 4) \)