Pls look at the image.don’t use arrays and stuff please

What is the largest decimal number that can be represented by a binary number with 4 place values? (remember, each place in a binary number has a value of a power of 2, starting in the ones place with 20.)

Linda subscribes to a cloud service. the service provider hosts the cloud infrastructure and delivers computing resources over the internet.what cloud model is linda using

How do we use the sumif formula (when dealing with different formats) ?