The diameter of a penny is about 7.9 x 10^-5 km. It would take about 2.1 x 10^9pennies

placed end to end to circle the equator once. What is the approximate length of the

equator?

165,900 km

Step-by-step explanation:

diameter is a straight line between two points on the circumference of a circle that passes between the center of the circle.

so if a penny has a diameter of 7.9 x 10^-5 km, and when placed end to end will require 2.1 x 10^9 pennies to circle the equator once, that means;

the approximate length of the equator will be:

7.9 x 10^-5 km x 2.1 x 10^9 pennies

= 165,900 km

false

step-by-step explanation:

4y - 6 + 4y^2 - 9

before simplifying this contains 4 terms

after simplifying

4y -15 + 4y^2

it contains 3 terms

answer: solve 5\cdot 2^x=2405⋅2  

x

=2405, dot, 2, start superscript, x, end superscript, equals, 240.

solution

to solve for xxx, we must first isolate the exponential part. to do this, divide both sides by 555 as shown below. we do not multiply the 555 and the 222 as this goes against the order of operations!

\begin{aligned} 5\cdot 2^x& =240 2^x& =48 \\ \end{aligned}  

5⋅2  

x

2  

x

​    

=240

=48

​

step-by-step explanation: