1 To find 4 times any nurber, Sayua uses doubling (multiplying by 2 , then by 2 agan), a Show how Sayua would solve \( 4 \times 9 \) ? b What is another way to solve \( 4 \times 9 \) ?

\( \square < \sqrt { 112 } < \square \)

Complete the problems to practice applying the skills and concepts learned in the section. 3. Suppose you spend 2 hours between Monday and Saturday studying for your 5-credit-hour chemistry course. To meet the college rule of thumb, how many hours do you need to study on Sunday? Is it possible? Is it effective?

Manakah dari matriks berikut yang termasuk jenis matriks singular: \begin{tabular}{ll} a. \( \left(\begin{array}{cc}2 & 3 \\ 3 & -5\end{array}\right) \) & c. \( _{1}\left(\begin{array}{cc}\sqrt{3} & 3 \\ -\sqrt{2} & -\sqrt{6}\end{array}\right) \) \\ b. \( \left(\begin{array}{cc}1 & -2 \\ -1 & 2\end{array}\right) \) & d. \( _{1}\left(\begin{array}{cc}\sin ^{2} x & 2 \\ -0,5 & \cos ^{2} x\end{array}\right) \) \\ \hline\end{tabular}

A rectangle has sides 9 and 12 units long. What is the perimeter of the rectangle?

\( \square<\sqrt{27}<\square \) Submit