Answer:
Charles Babbage
Explanation:
Analytical engines were presumed to be the first general-purpose computer which was designed sometime in the 19th century by Charles Babbage - a British mathematician and inventor. A series of punch cards was used by Charles Babbage in his design of the engine. These punch cards were used for various operations such as arithmetical operations, numerical constants and other operations such as load and store.
<em>Hope this works!</em>
The issue arises because the string you are trying to print is not a string, rather a float value. Item1, item2 and item3 are strong values (if you type some alphabets in it and not just numbers), but itemonecost, itemtwocost, and itemthreecost are explicitly type casted to float. In line 22, 23, and 24 you’re trying to print a float, by adding it with the string. One cannot add numbers to string. Rather you can type cast the itemcost to string while printing.
Add str(itemonecost) instead of itemonecost in print statement. Do this for other float variables too.
However do note that there are multiple ways to correct this issue, and I’ve just pointed one out.
Answer:
c. let v = silo.volume();
Explanation:
When you create and initialize a new object you pass through that object's class constructor. The constructor is in charge of initializing all the necessary variables for that class including radius and height. Once you save the object in a specific variable (silo) you need to call the class methods through that variable, using the '.' command. Therefore, in this scenario, in order to call the volume() method you would need to call it from the silo object and save it to the v variable, using the following statement.
let v = silo.volume();
Because its a old type of software and probably wont run on your computer
