9. A waffle iron can make a waffle in 4 minutes. How many waffles can be made in an hour?​

15 waffles

Step-by-step explanation:

60 minutes in an hour.

60/4 = 15

The solution is: 15 waffles can be made in an hour.

Division is the process of splitting a number or an amount into equal parts. Division is one of the four basic operations of arithmetic, the ways that numbers are combined to make new numbers. The other operations are addition, subtraction, and multiplication.

here, we have,

given that,

A waffle iron can make a waffle in 4 minutes.

now, we have to find that, how many waffles can be made in an hour.

we know that,

there are, 60 minutes in an hour.

so, we have to find that, how many waffles can be made in 60 minutes.

we have,

in 4 mint make 1 waffles

so, in 1 mint make 1/4 waffles

so, in 60 mint make = 1/4 * 60

                                 = 15 waffles

i.e.

60/4 = 15

Hence, The solution is: 15 waffles can be made in an hour.

To learn more on division click:

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The Artist and His Work
Reuben (Rube) L. Goldberg was an American cartoonist. He is best known for drawing elaborate machines. His drawings showed machines with wheels, gears, handles, pails, and other interesting devices. The machines in Goldberg's drawings were designed to take a simple task and make it complex. The contraptions he drew 80 years ago were so funny that they continue to inspire young scientists and engineers today.

Goldberg's Career
Goldberg's cartoons appeared in several respected New York City newspapers, including the New York Evening Journal and the New York Evening Mail. The cartoonist also wrote a feature film called Soup to Nuts, which was the first film starring the Three Stooges. Goldberg's machines appear in the film.

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Every year students build machines based on Goldberg's designs for school projects, for competitions, or simply for fun. Goldberg's machines operate based on cause and effect. Students and engineers of all ages can learn to build these elaborate cause-effect machines. The key to building one of these machines is to understand how to use gravity and force to push and pull objects along a path. Reading up on these concepts is a good place to start. After that, building the machines is all about having fun. Find a simple task for the machine to do. Then, find a complicated way for the machine to do it.

The Cause-Effect Machine in Popular Culture
Cause-effect machines are incredibly fun to watch. For this reason, they have found their way into Hollywood movies such as Back to the Future and The Goonies. The machines also inspired a board game for kids called Mouse Trap. Clearly, Goldberg's machines have a place in our popular culture.
4
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How to Build a Cause-Effect Machine
B.
The Artist and His Work
C.
Goldberg's Career
D.
The Cause-Effect Machine in Popular Culture

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