What decimal value does the 8-bit binary number 1000 have if it is on a computer using signed-magnitude representation?

1 0 0 1 1 1 1 0

0 * 2^{0} + 1 * 2^{1} + 1 * 2^{2} + 1 * 2^{3} + 1 * 2^{4}  + 0 * 2^{5} + 0 * 2^{6} = 30

The sign digit is a 1, so the entire number is negative, which gives -30.

i do believe its (c); they are required to perform any summarization or redistribution tasks

explanation:

professionals can use many types of technology that can them. some examples are, computers (they research and can use for programs for data, they are also used for job applications, school work, and even to make new ideas), speedometers (can get data for unknown data), sometimes something as small as a pen (used for rough drafts, to insert data, and again job applications).